Thermal Underwear & Long Johns

Thermal underwear

Layer up. Stay warm.

Cotton thermal underwear sets, long johns and waffle-knit thermal shirts for men and women. Value multi-packs, sizes up to 4XL on select styles, and free U.S. shipping on every order.

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Free U.S. shippingOn every order

Ships in 1–2 daysUSPS, with tracking

14-day returnsNo restocking fees

Bundle & SaveUp to 10% off 2+ items

Why our thermals

A warm base layer that disappears under your clothes.

☁Soft cotton

Comfortable and breathable against the skin, all day long.

↕Top & bottom sets

A complete base layer in one buy, with matching colors.

✔Easy to layer

Slim enough to wear under jeans, work clothes and uniforms.

$Value packs

Two-packs and multi-packs that cost less per set.

Which thermals are right for you?

If you need…	Try this
An everyday base layer under work clothes	Men’s 2-Piece Cotton Thermal Underwear Set
Bigger sizes, up to 4XL	Men’s Cotton Long Johns Base Layer Set
Women’s thermals in lots of colors	Women’s Thermal Long Johns Set
Enough sets for the whole week	Men’s Cotton Thermal Sets, 2-Pack
Just a warm top layer	Men’s Waffle Knit Thermal Crew Shirt
A value pack of thermal shirts	Men’s Ribbed Knit Thermal Shirts, 3-Pack

How should thermals fit?

Each listing has its own size chart. These tips help you choose.

Snug, not tightThermals keep you warmest when they sit close to the skin without squeezing.

Between sizes?Size up if you’ll wear them under fitted clothes or like a relaxed feel.

Check the chartSizes vary by style, so compare your measurements with the chart on each listing.

Questions, answered

Can I wear thermals on their own?

Yes. Many customers wear the tops as everyday long-sleeve shirts and the full sets as warm loungewear or pajamas.

How do I wash them?

Follow the care label on each item. Washing in cold water and tumble drying on low helps cotton keep its shape and size.

Do you have women’s thermals?

Yes. Our women’s thermal long johns set comes in six colors and sizes S–2XL.

How fast is shipping?

Orders ship within 1–2 business days by USPS and usually arrive 3–5 business days later. Shipping is free on every U.S. order.

Can I return them?

Yes. New and slightly used items can be returned by mail within 14 days of delivery, with no restocking fees. See our refund policy.

Build your winter base layer and save

Buy any 2 items, save 5%. Buy 3 or more, save 10%. Mix thermals, socks, hats and gloves.

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