Thermal Underwear & Long Johns
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.
Why our thermals
A warm base layer that disappears under your clothes.
Comfortable and breathable against the skin, all day long.
A complete base layer in one buy, with matching colors.
Slim enough to wear under jeans, work clothes and uniforms.
Two-packs and multi-packs that cost less per set.
Thermal underwear sets & long johns
Thermal shirts
Finish your winter kit
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.
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.
Shop thermal sets