Top 9 Union Suit Heavy – Men’s Base Layers

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1. Carhartt


Medium, Carhartt Men's Force Classic Thermal Base Layer Union Suit, Black

Carhartt #ad - Strategic seam placement for maximum comfort and reduced chafing. Back opening with elastic waistband Tuck closure. Rugged flex technology for ease of movement. Snap-button front, concealed thumb loops and concealed dry low-stitch waistband. Waffle knit traps heat and smooth flat lock seams and tagless label enhance comfort.
BrandCarhartt #ad
ManufacturerCarhartt #ad
Height0.7 Inches
Length5 Inches
Width5 Inches
Part NumberMUS130-001-M

2. ColdPruf


ColdPruf Authentic Dual-Layer Union Suit, Men

ColdPruf #ad - Full button Front and Gussets. Single button Vertical Rear Flap. Versatile sizing: our one-piece long johns for men are available in regular sizes S to 2X. Ring spun yarns Provides Exceptional Softness. Combats cold conditions: our men’s thermal underwear helps you weather very cold to extremely cold conditions during low- to medium-exertion activities like hiking, camping, and even lounging.

Comfort-driven design: men’s romper-style longs johns feature a comfortable one-piece construction complete with a full-button front and gussets, plus a one-button vertical flap seat with branded, horn-style buttons. Relaxed fit: our tagless thermal underwear for men boasts a generous cut that allows for a full range of motion; A tagless design and flat seams ensure a soft, smooth next-to-skin feeling.

Tagless full cut one Piece For Comfort with Flat Seams. Reliable heat retention: dual-layer engineering with Merino wool fabric traps body heat between layers to provide a chill-blocking natural barrier of warmth. Thermachoice system: very cold to extreme cold weather/low to MEDIUM ACTIVITY.
BrandColdPruf #ad
ManufacturerColdPruf Baselayer #ad
Weight1 Pounds
Part Number94USLGRD

3. Guide Gear


Large, Olive Brown, Thermal and Moisture Wicking, Guide Gear Men's Heavyweight Fleece Base Layer Union Suit

Guide Gear #ad - Gusseted crotch allows for comfortable movement so you do not feel restricted or tight with wear. Get the best fit and wear that hugs your figure accordingly. Gusseted crotch: experience free flowing movement with our hunting base layer for men.

Top to bottom warmth: guide gear long johns for men provide head to toe warmth so each body part is pampered with cozy heat that makes it easy to withstand outdoor cold conditions. No itch feel: thermal base layer for men is crafted with a tagless neck for itch-free comfort and wear. Elastic stretch fit: guide gear insulating suit fleece comes with an elastic back opening for your convenience.

You can wear it all day with no discomfort or irritation whatsoever. Feel dry relief while keeping odor and bacteria at bay. Moisture wicking piece: this cold weather base layer is intended to collect all sweat and moisture so you stay presentable on the job.
BrandGuide Gear #ad
ManufacturerGuide Gear #ad
Height7 Inches
Length14 Inches
Weight0.8 Pounds
Width4 Inches
Part NumberM01021

4. Rocky


3X-Large, Rocky Heavyweight Thermal Underwear For Men Extra Heavy Thermal Long Johns Set Shirt & Pants, Base Layer w/ Leggings/Bottoms Ski/Extreme Cold Black

Rocky #ad - Machine washable for easy cleanup: while cheap thermal underwear unravel in the washing machine after only a few cycles, Rocky uses high-quality stitching for thermal leggings and long sleeve shirts that stand up to the washer -- even with super-active days and many muddy adventures. Fleece-lined comfort without the bulk: don’t let the lightweight fabric fool you, thanks to the fleece-lined design, this thermal underwear set gives you high-quality warmth that fans say keep them warmer than traditional puffy thermals or wool base layers that leave you feeling strangled or trapped.

No more awkward adjusting thanks to elastic seams: check out the pictures and see how this men’s thermal underwear set is crafted using elastic seems that keep tops and bottoms from falling down or bunching up even on long walks to school, snowboarding, and if your family enjoys skiing, or ice skating then Rocky makes a great base layer -- but without the sagging and ‘awkward adjustments’.

Keep warm without the sweaty mess: happy customers say the unique breathable, without becoming sweat-soaked, moisture-wicking fibers on Rocky thermal underwear keeps them warm, so trips to the snow aren’t ruined by constant uncomfortable sweating and overheating. No more old-school scratchy insulated underwear: traditional cotton long underwear are simply scratchy and uncomfortable to wear for long periods of time, Rocky thermals are made from a soft, comfy polyester blend so you can enjoy all-day comfort, and your winter adventures never have to end.
BrandRocky #ad

5. #followme


#followme Women's Thermal Henley Onesie Union Suit 6743-RED-S

#followme #ad - You’ll love the great attention to detail that has gone into making the adult thermal onesie, and all at a price that your wallet will love. Comfy & cozy: keep warm with thermal clothes designed with impressive comfort in mind. Value for money: #followme prides itself on giving you the latest styling at the best value around.

Choose between our lovely shades of black, white, grey heather, red & purple that remain intact even after multiple washes. Followme thermal underwear one pieces PJs are made using a soft blend of 60% cotton and 40% polyester that allows your skin to naturally breathe while still keeping you toasty. Made to last: the women’s jumpsuit pajamas blend the comfort of cotton with the durability of polyester to create a garment that will sail you through numerous chilly moments. No dealing with thermal wear that itches, scratches and causes you to break into an uncomfortable sweat.

Click ‘add to Cart’ now! Great for layering: this women’s henley thermal onesie has a snug fit, making it great for layering on cold days or for use as fitted PJs. Stay stylish in solids: beautiful and timeless, pastel pink, these solid thermal jumpsuits cater to just about any taste and come with a stylish Henley neck for a classic look. Simply toss the ladies thermal one piece into the machine for a quick clean without shrinking or running color.
Brand#followme #ad
Height0.7 Inches
Length5 Inches
Weight0.5 Pounds
Width5 Inches

6. Terramar


S, Terramar Men's Standard Military Fleece Stretch Comfort Zip Union Suit, Black

Terramar #ad - Made from a 100% polyester, hunting, skiing, hiking, snowshoeing, snowboarding, it creates an extremely comfortable and soft base layer full body suit meant for all day use during the cold winters! Ideal for outdoor riding, and outdoor activities.

To keep it in perfect shape for as long as possible, we recommend hang drying. Tumble dry low. For a more relaxed fit, Small, Medium, order a size up!. How to wash: washer and dryer safe! machine wash cold with like colors and only non-chlorine bleach when needed. Do not iron. What you get: a terramar sports men's union fleece stretch comfort zip Suit that comes in all Black and available in the sizes: X- Small, Large, X-Large. Features: thermoregulation terramar sports technology that keeps you comfortable in all conditions and engineered to adjust to your body temperature due to our custom ClimaSense technology that helps control your body temperature! Climasense is a propriety fabric technology formulated to adapt to an active body’s changing physiology.

Key among them are the outside weather conditions and the activity level. A number of factors influence the skins surface temperature.
BrandTerramar #ad
ManufacturerTerramar #ad
Height1 Inches
Length39 Inches
Weight0.25 Pounds
Width1 Inches
Part NumberW8711-026



Indera Traditional Knit Union Suit

INDERA #ad - Versatile sizing: our one-piece long johns for men are available in Tall and sizes up to 4X. Soft cotton construction: Our tagless thermal underwear for men is constructed of 100% cotton.

Comfort-driven design: men’s romper-style longs johns feature a comfortable one-piece construction complete with a full-button front, one-button vertical flap seat, and set-in sleeves. Reliable heat retention: made of 1x1 rib-knit fabric, our men’s long underwear offers a snug, yet stretchy fit; Ribbed collar and cuffs help keep the cold out. Combats cold conditions: our men’s thermal underwear helps you weather cold to very cold conditions during medium-exertion activities like hiking, camping, and even lounging.
BrandINDERA #ad
ManufacturerColdPruf Baselayer #ad
Height2 Inches
Length17.5 Inches
Weight1 Pounds
Width12 Inches
Part Number860US

8. Rocky


Base Layer w/ Leggings/Bottoms Ski/Extreme Cold Black, X-Large, Rocky Thermal Underwear For Men Thermal Long Johns Set Shirt & Pants

Rocky #ad - Keep warm and dry: rocky thermal underwear for men has moisture-wicking fibers that prevent you from becoming sweat-soaked, while our fleece-lined design keeps you warm and comfortable in weather below 30°F 0°C. So feel free to wear this shirt and pants on your daily activities and even your muddiest adventures.

When nature calls, you don’t have to worry. The elastic seams keep tops and bottoms from falling or bunching up, skiing, like hiking, making them perfect to wear under regular clothes during daily activities. Our soft and comfy polyester blend gives you all-day comfort! Despite the lightweight fabric, you’ll have warmth throughout the day and night without the heaviness and puffed feeling of most traditional thermal base layers.

Our thermal underwear comes with a Contour Pouch that not only nestle the boys comfortably, but also provides easy access thanks to the vertical quick draw fly. Easy to clean, and it won’t cause any damage to the fabric, it can be machine-washed, thanks to our high-quality stitching. It’s perfect for men who like to practice outdoor and winter sports, camping, or snowboarding.
BrandRocky #ad
Height0.7 Inches
Length5 Inches
Width5 Inches

9. Noble Mount


Waffle Knit Thermal Mens Onesie Pajamas, Medium, Charcoal, Mens Union Suit

Noble Mount #ad - Tumble dry on low heat. The brushing retains body heat better than non-brushed fabrics. Styling: our union suit men love features sturdy rib cuffs that provide stretch. Button Placket all the way.

Easy wash & care: noble mount union suits are machine washable in cold gentle cycle. Our customers tell us that they wear this thermal onesie/thermal suit as a sleepwear too. Cotton brings comfort and Polyester bring Durability. Superior fit and feel. The back flap is very functional but button closure. Wash with like colors for the first wash. This lends it superior warmth and comfort during the cold temperatures.

Construction: waffle knits are known to prevent cold air flow and add to it our heavier construction and that makes these mens union suit extremely warm and durable. Warmth: our thermal union suit/adult onesies for men are made from lightly brushed fabric. Fabric: noble mount union suit is made from cotton rich blend of 60% Cotton and 40% Polyester.
BrandNoble Mount #ad