12 best one piece base layers
"One-piece base layers" typically refer to a type of clothing designed to provide comfort and insulation, often used in cold weather or as a foundation layer for outdoor activities.Here's what you need to know about one-piece base layers:
Purpose: One-piece base layers are primarily worn to regulate body temperature and moisture during various outdoor activities. They help keep the wearer warm in cold conditions while wicking away moisture (sweat) to keep the skin dry.
Material: These base layers are typically made from moisture-wicking and insulating materials, such as synthetic fabrics like polyester or natural fibers like merino wool. Merino wool, in particular, is prized for its ability to retain warmth even when wet and its odor-resistant properties.
Design: One-piece base layers are designed to fit snugly against the body without being restrictive, providing warmth without bulk. They often have a zippered front or other means of easy entry and exit.
Suitable Activities: These base layers are suitable for a wide range of outdoor activities, including skiing, snowboarding, hiking, camping, and cold-weather sports. They can also be used as pajamas or loungewear in colder indoor environments.
Layering: One-piece base layers are typically the first layer of clothing worn next to the skin. They are part of a layering system that includes additional clothing layers (mid-layers and outer layers) to provide insulation and protection from the elements.
Moisture Management: One of the key functions of these base layers is moisture management. They wick sweat away from the skin to the outer layers of clothing, where it can evaporate, keeping the wearer dry and comfortable.
Temperature Regulation: Base layers help regulate body temperature by trapping a layer of warm air close to the skin. In cold weather, they provide insulation, and in warmer conditions, they help prevent overheating by efficiently moving moisture away from the body.
Gender and Sizing: Base layers are available for both men and women, with sizing options to ensure a snug but comfortable fit. In your query, you mentioned "Girls," so it's worth noting that there are also one-piece base layers designed for girls, tailored to their specific sizing and needs.
Versatility: One-piece base layers are versatile and can be worn not only for outdoor activities but also as thermal underwear in everyday situations when extra warmth is needed.
These one-piece base layers are a valuable addition to the wardrobe for anyone who enjoys outdoor activities in cold weather or wants to stay warm and comfortable during the winter months. They offer both insulation and moisture-wicking properties, making them an essential component of layering for staying comfortable in challenging weather conditions.
Below you can find our editor's choice of the best one piece base layers on the market
Carhartt Men's Force Classic Thermal Base Layer Union Suit
Carhartt
Product description
Made of premium 8-ounce fabric, Carhartt mid weight cotton union suit delivers total body warmth in one comfortable garment. Its rib-knit neck and cuffs retain warmth, and seams are flat-lock stitched for added durability. For comfort and convenience, the fly and back opening feature button closures.
- 60% Cotton, 40% Polyester
- Imported
- Snap closure
- Machine Wash
- Waffle knit traps heat and smooth flat lock seams and tagless label enhance comfort
- Rugged flex technology for ease of movement
- Snap-button front, concealed thumb loops and concealed dry low-stitch waistband
User questions & answers
| Question: | How warm are these |
| Answer: | The bottle is glass but the “metal “ part is plastic |
| Question: | Could this be worn in warmer weather or is it too warm |
| Answer: | Common sense tells me they come from two different vendors. Or, they are not warehoused together. |
| Question: | I’m 6’2” 140 pounds and skinny what’s the best size |
| Answer: | This perfume is like a fresh cologne, it is recommended for the day during Spring and Summer. Mostly Males over the age of 25 like this scent. Thank you |
| Question: | I am 6'5" tall and 315lbs. What size should I order |
| Answer: | Jaguar is very nice cologne.It has a hint of Chrome Azzaro to me, for the price you can't go wrong.James Bond uses this cologne.For the secret agent in all of us........Right Q. |
Product features
Poly-Wool Blend
Moisture wicking.
Wicking treatment
Keeps you dry and comfortable.
RuggedFlex
Moves with you.
AIRBLASTER Men's Merino Ninja Suit Hooded Outdoor One Piece Base Layer
Airblaster
Product description
The gold standard of base layer. Built from our proprietary merino-rich 4-way stretch fabric, the Airblaster Merino Ninja Suit is the standard by which all other functional base layers are measured. With 55% Merino / 37% Tencel / 8% Spandex, our unique blend is 45% stronger and dries twice as fast compared to Merino alone. We use only non-mulesed wool from New Zealand and Australia, because sheep are people too.
- 55% Merino Wool, 37% Tencell Lyocell, 8% Elastic
- Imported
- Zipper closure
- Machine Wash
- ONE PIECE LAYERING: A full suit layering system eliminates cold air drafts at your core. It means your shirt doesn't pull out of your snow pants when adjusting your boot laces. If you take a tumble snowboarding, the snow can't find it's way down your underpants.
- 350 DEGREE WAIST ZIP FOR EASY BATHROOM ACCESS: With over 10 years of "testing" in the mountains, car camping, couch surfing, and countless outdoor adventures, we can confidently say this just simply WORKS.
- 7 PANEL FORM-FITTING HOOD WITH CHIN PROTECTOR: Lightweight enough to be tucked under your outer garments, under a beanie or helmet. Stretchy enough to fit over your beanie.
User questions & answers
| Question: | Is it a massive task to relieve yourself for toiletry needs |
| Answer: | You will need to ask the company this question. |
AIRBLASTER Womens HOODLESS Ninja Suit
Airblaster
- 94% Poly, 6% Spandex
- Imported
- Zipper closure
- Machine Wash
- ONE PIECE LAYERING: A full suit layering system eliminates cold air drafts at your core. It means your shirt doesn't pull out of your snow pants when adjusting your boot laces. If you take a tumble snowboarding, the snow can't find it's way down your underpants.
- 350 DEGREE WAIST ZIP FOR EASY BATHROOM ACCESS: With over 10 years of "testing" in the mountains, car camping, couch surfing, and countless outdoor adventures, we can confidently say this just simply WORKS.
- THUMB LOOPS AT CUFF: Creates an efficient seal to keep the snow or cold elements out, and makes managing your personal microclimate a seamless experience.
YANGXINYUAN Womens Onesie Pajamas Base Layers Thermal Underwear Long Sleeve Jumpsuit Sleepwear
- Enjoy Extra Comfort：Super soft sexy one piece pajamas (65% Polyester and 35% Cotton). Snug fit, soft fabric, lightweight and breathable, a good choice for sleepwear jumpsuit.
- Delicate Design: Long-sleeve coverall in two-layer thermal featuring full-button placket and crew neckline . Botton-up front to easily put on and take off.
- Suit for Any Occasions: Great for using as PJ's loungewear when you're at home after work and on weekends on for those cold nights. These sets of "1 piece" long johns can be the perfect under layer of your clothing to make you stay warm when you work outside in cold conditions, go for biking, mountains, snowboarding or other winter activities, live or travel to the cold places.
- Ideal Gift: Available in various sizes so you can find just the right size that matches you. Choose from different sizes and treat yourself to the most comfortable-fitting thermal union suit today. Give this Jumpsuit as a thoughtful gift for your loved one's next birthday or for Christmas.
- Notice :Please Check The Size Before You Purchase. If you have any question ,pls contact us.
User questions & answers
| Question: | Can I use this for pajamas or will I be too warm |
| Answer: | I'm 6'2" and 365. I ordered 3XL and it fits quite well without being snug or short anywhere (in the arms or legs). I'd say you're on the edge of 2XL/3XL, but I'm thinking 2XL might work. I'm not sure of the return policies for clothing, but check 'em out. |
| Question: | What material is about the onesie pajama |
| Answer: | My husband did not like this cologne; he stated that it didn't smell good at all. (LOL, his actual boss didn't like it either). Try "Curve Black or Bleu de Chanel" cologne for men. |
| Question: | Does this mean I'll have to get half naked when using the restroom in these |
| Answer: | Yes |
| Question: | Will this one-piece thermal underwear shrink |
| Answer: | It was real for me.... no fake |
Product features
SIZE for Bandage One Piece Pajama Romper
- S : Shoulder: 14.04 inch, Chest: 33.54 inch, Length: 53.63 inch, Sleeve: 22.23 inch;
- M: Shoulder: 14.82 inch, Chest: 35.88 inch, Length: 54.60 inch, Sleeve: 22.62 inch;
- L: Shoulder: 15.41 inch, Chest: 38.81 inch, Length: 55.58 inch, Sleeve: 23.01 inch;
- XL: Shoulder: 15.99 inch, Chest: 41.73 inch, Length: 56.55 inch, Sleeve: 23.40 inch;
- 2XL: Shoulder: 16.19 inch, Chest: 46.02 inch, Length: 57.53 inch, Sleeve: 23.60 inch;
Button top pajama set
Functional Buttons
Button down thermal underwear set , easy to put on and take off
Womens Onesie Sleepwear
Comfortable Crew Neck
It will not be too loose to too tight when U wear. Keep warm in winter
Soft Onesie Pajamas Ladies
Comfortable Fit
Stretchy breathable fabric with great touch. Good choice for sleepwear jumpsuit
Jumpsuit Bodysuit Sleepwear
Fashion Design
Elastic cuffs at ankle and sleeves to hold in warmth
Hotouch Men's One Piece Pajama Long Thermal Union Suit Button Down Pajamas S-XXL
- 65% Polyester, 30% Cotton, 5% Spandex
- Pull On closure
- ENJOY EXTRA COMFORT: This one piece thermal union suit is designed to respond to temperature changes in your environment to keep you comfortable all day long.Hotouch men’s thermal underwear onesie are made using a soft blend of 65% polyester and 30% cotton that allows your skin to naturally breathe while still keeping you toasty
- DELICATE DESIGN: Long-sleeve coverall in two-layer thermal featuring full-button placket and crew neckline with tagless label. Botton-up front to easily put on and take off.
- GREAT FIT: Built for athletic builds with higher armholes and lower trouser rise. Close fit along torso and connections to extremities- better movement allowed.
- VALUABLE GIFT: Available in various sizes so you can find just the right size that matches you. Choose from different sizes and treat yourself to the most comfortable-fitting thermal union suit today. Give this Jumpsuit as a thoughtful gift for your loved one's next birthday or for Christmas.
- ABOUT SIZE: Our size are standard US size, please choose your general thermal underwear size(S-XXL).Please check the size information under the Last Detail image before ordering to ensure you the utmost satisfaction possible with this product.
User questions & answers
| Question: | My husband is 59 and weighs 250 pounds will a double extra large fit him |
| Answer: | I bought this for my son as a Christmas gift. He absolutely loves it. In response to your specific question, I believe the answer is NO. |
| Question: | Im 5'10 192. What size should i get |
| Answer: | Don't know the size chart is either off or they sent a boys size by mistake. An 5.8 tall 175lb person could not get these to come up over his shoulder. I would recommend going to a sporting goods store where you can try them on and make sure they fit right. We still have them new in the box sitting here from last Christmas. Complete waist of money. |
| Question: | I'm 5'7" and weigh 156, which size might fit me properly? Thank you |
| Answer: | too warm |
| Question: | Is there a back flap |
| Answer: | I would go to the Carhartt website and look at the size chart that is there. |
Product features
Hotouch Thermal Union Suit are a nice addition for fall, winter and spring
SWOMOG Womens Pajamas Jumpsuits Zip-up Hoodie Union Jumpsuit Romper Sexy Onesies Long Sleeve Bodysuits One Piece Sleepwear
- 5% spandex
- Material: SWOMOG Womens jumpsuits pajamas are made of high quality Modal(95% Rayon, 5% Spandex). Super soft, breathable, comfy and high elastic to wear. This well constructed one piece underwear are super cozy to sleep in every night.
- Features: Take your off-duty look to the next level with this one piece pajamas jumpsuit. Featuring lightweight fabric with solid color, long sleeve body-con hoodie and two pockets. The zipped placket of the sleepwear do allow for quick opening and closing, easy to put on and take off. It's fitted with ribbed cuffs at the wrists and ankles with spandex, which can keep you warm.
- Occasions: You can wear our women onesie as one piece sleepwear. Comfortable and suitable for lounging, sleeping, pajama party and so on. This jumpsuit is also perfect for casual, jogging, yoga, sports, outdoor, night club, dating and etc. Jumpsuits and rompers are effortless, chic and fun - an all-in-one outfit that works for a variety of occasions.
- Gift: SWOMOG women pajamas jumpsuits is a geat choice for your wife, girlfriend, mother, sister and doughter as a birthday gift and great present for New Year, Valentine's Day, Christmas Day, or other holiday party occasion.
- Size&Care: Please check the size information in the left image or under the product description before ordering. Our jumpsuits for women are also machine washable for your convenience.
User questions & answers
| Question: | Does this item run small or true to size |
| Answer: | Yes |
| Question: | Does the zipper go all the way up to cover the face |
| Answer: | I washed it once, but there was no shrinkage. Because the material of this one-piece pajama is cotton blend, it is not easy to shrink. |
AIRBLASTER Kids' Youth Ninja Suit Hooded Outdoor One Piece Base Layer
Airblaster
Product description
The secret to longer, warmer days on hill.... For everyone! The simple, functional design of the Youth Ninja Suit makes for easier dressing and undressing, quicker potty breaks, and most importantly: Warmer, happier kids! Meaning an easier day for you, filled with less whining and more turns. The only new problem might that your kids won't ever want to get out of their Ninja Suits... Fortunately, they also make the world's best pajamas.
- Material: 4-way stretch Air-Tech, (94% polyester, 6% lycra)
- Insulation Weight: midweight
- Fit: slim
- Style: one-piece
- Hood: scuba
User questions & answers
| Question: | What size for an average sized 8 year old girl |
| Answer: | Yes you can use them as pajamas. But they definitely will keep you warmer than regular winter PJs. |
| Question: | What is an XS on the Size chart |
| Answer: | Cotton polyester blend. Comfortable on the skin. |
AIRBLASTER Women's Merino Ninja Suit Hooded Outdoor One Piece Base Layer
Airblaster
Product description
The gold standard of base layer. Built from our proprietary merino-rich 4-way stretch fabric, the Airblaster Merino Ninja Suit is the standard by which all other functional base layers are measured. With 55% Merino / 37% Tencel / 8% Spandex, our unique blend is 45% stronger and dries twice as fast compared to Merino alone. We use only non-mulesed wool from New Zealand and Australia, because sheep are people too.
- 55% Merino Wool, 37% Tencell Lyocell, 8% Elastic
- Imported
- Zipper closure
- Machine Wash
- ONE PIECE LAYERING: A full suit layering system eliminates cold air drafts at your core. It means your shirt doesn't pull out of your snow pants when adjusting your boot laces. If you take a tumble snowboarding, the snow can't find it's way down your underpants.
- 350 DEGREE WAIST ZIP FOR EASY BATHROOM ACCESS: With over 10 years of "testing" in the mountains, car camping, couch surfing, and countless outdoor adventures, we can confidently say this just simply WORKS.
- 7 PANEL FORM-FITTING HOOD WITH CHIN PROTECTOR: Features a ponytail-portal for women. Lightweight enough to be tucked under your outer garments, under a beanie or helmet. Stretchy enough to fit over your beanie.
AIRBLASTER Men's Hoodless Ninja Suit Outdoor One Piece Base Layer
Airblaster
Product description
If you feel claustrophobic in a hood, prefer classic mock neck base layer, or just like to let your hair blow in the wind, the Hoodless Ninja Suit is the base layer for you. We highly encourage you to step in, zip up, and enjoy the superior coziness of complete body coverage... with the top down.
- 94% Poly, 6% Spandex
- Imported
- Zipper closure
- Machine Wash
- ONE PIECE LAYERING: A full suit layering system eliminates cold air drafts at your core. It means your shirt doesn't pull out of your snow pants when adjusting your boot laces. If you take a tumble snowboarding, the snow can't find it's way down your underpants.
- 350 DEGREE WAIST ZIP FOR EASY BATHROOM ACCESS: With over 10 years of "testing" in the mountains, car camping, couch surfing, and countless outdoor adventures, we can confidently say this just simply WORKS.
- THUMB LOOPS AT CUFF: Creates an efficient seal to keep the snow or cold elements out, and makes managing your personal microclimate a seamless experience.
Hotouch Mens Onesie Pajamas Ultra Soft Thermal Union Suit One Piece Pajama with Butt Flap Sleepwear S-XXL
- 60% Polyester, 35% Cotton, 5% Spandex
- Imported
- 【One Piece Pajamas】In 2020 we upgraded the fabric.This men’s thermal underwear onesie pajama suit are made using a soft blend of35%cotton&60%polyester& 5%spandex that allows your skin to naturally breathe while still keeping you warm.
- 【Men's PJS】Long-sleeve coverall in base-layer thermal featuring full-button placket and crew neckline.Button-up front to easily put on and take off.
- EASY TO CLEAN: Simply toss the one piece pajamas into the washing machine for a hassle-free clean without risk of shrinking or losing color.
- 【Occasion】Suitable as loungewear, sleepwear, underwear, long johns, costume party, both male and female can wear it, family pajama for holiday, Christmas, Holloween, New Year
- 【ABOUT SIZE】Our size are standard US size, please choose your general thermal underwear size(S-XXL).You can find just the right size that matches you. Choose from different sizesPlease check the size information under the Last Detail image before ordering to ensure you the utmost satisfaction possible with this product.
User questions & answers
| Question: | Black pajams with red long sleeveIs the color the same as the picture |
| Answer: | The cuts seem a little small maybe 3x for comfort. |
| Question: | Is the seat slotted or is the seat flapped |
| Answer: | I would suggest a large unless you like it on the snug side |
| Question: | Does the dumper stay buttoned? I have had a problem with the back door not stay shut in the past |
| Answer: | I’d say Medium. |
| Question: | will they srink when washed |
| Answer: | Do they come with butt flap |
Ekouaer Onesies Thermal Underwears Christmas Union Jumpsuit One Piece Base Layers Hooded Sweatshirt Sleepwear for Women
- Super quality. Snug fit, soft fabric, lightweight and breathable, good for sleepwear jumpsuit, thermal underwears or base layers.
- Design: Contrast Color，Adult Onesies Jumpsuit pajamas feature cuffed long sleeves with front zipper and side pockets.
- Comfort relaxed fit one-piece lounger house Pajama's, Side seam pockets, Chest slip Pocket, Long sleeves with contrast color trim, cuffs and inner lined drawstring hood.
- This well constructed one piece thermal underwear are super cozy to sleep in every night. The zipped placket of the sleepwear do allow for quick opening and closing and can be also functional for pregnant and nursing use. You can wear this jumpsuit as pajamas loungewear when cooking breakfast in the morning or lounge around your house after work.
- Relive your childhood memories in these adult union pajamas. Great for chilly nights, a family Holiday card, birthday,Christmas ,or a Halloween costume.
User questions & answers
| Question: | Does this fit true to size |
| Answer: | Large so she can grow into it |
| Question: | is there a size chart |
| Answer: | I would say that's for 4-6 year old I purchased the small for my almost 9year old daughter and it was too small and the medium is too big. However they are awesome! |
| Question: | When worn under clothes, does the texture allow clothes to move /slide without clinging to the underwear |
| Answer: | yes |
| Question: | Can I use this for pajamas or will I be too warm |
| Answer: | Yes |
Product features
Ekouaer Onesies Thermal Underwears Christmas Union Jumpsuit One Piece Base Layers Hooded Sweatshirt Sleepwear for Women
Since the establishment in 2015, Ekouaer convincedthat " design to enhance the quality" principle, has been adhering to the comfortable, simple and classic design concepts, the products sell well all over the world, well received by the customers.
With exquisite craftsmanship, specialized andoriginality design, high-grade fabrics and professionalquality monitoring, to ensure that the quality of our products up to international standard and provide customers with good value, a relevant assortment and an enjoyable shopping experience.
Best One Piece Pajama womens Long Thermal Underwear Jumpsuit
AIRBLASTER Unisex Youth Ninja Suit Hooded Outdoor One Piece Base Layer
Airblaster
Product description
The secret to longer, warmer days on hill. For everyone! The simple, functional design of the Youth Ninja Suit makes for easier dressing and undressing, quicker putty breaks, and most importantly: Warmer, happier kids! Meaning an easier day for you, filled with less whining and more turns. The only new problem might be that your kids won't ever want to get out of their Ninja Suits. Fortunately, they also make the world's best pajamas.
- 100% Nylon
- Imported
- Zipper closure
- Machine Wash
- Seamless One-Piece Protection
- 4-way Stretch AIR-TECH Fabric With Ninja Star Embroidery
- Form Fitting Hood With Chin Protector
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