Base Layers & Thermal Underwear Made in USA

Corbeaux men's base layers collection includes hoodies, pants, long sleeve tops, button ups, and more hand sewn in Minnesota.

Duckworth base layers are are American made using Montana sourced merino wool. The men's base layer collection includes tops with and with out hoods, leggings, and briefs.

Kenyon thermal bottoms and thermal tops are made in Rhode Island. There are many fabrics to chose from including fleece, polyester, Polartec®, and silk weight. Kenyon's base layers and thermals are very affordable.

Polartec Military Issue base layers and original thermal underwear is made in USA.

Rambler's Way wool long john's underwear are made in Maine from Rambouilet merino wool. They are lightweight and warm.

Made in USA by Shivers, this lightweight long underwear bottoms for men has the socks attached to the pants. This warm layer fits snug like tights. Made with high tech fibers that keep in warmth and hold back sweat.

U.S. Military wool/cotton blend thermal underwear is made in USA. These are like the long underwear grandma and grandpa used to wear!

WSI Sportswear base layers for men includes bottoms, long sleeve shirts and more, all made in Minnesota.

Wuru Nuyarn® base layer long sleeve shirt and leggings are hand sewn in the USA. They are made from Australian merino wool that is woven in Vietnam.

Corbeaux women's base layer collection includes crew neck long sleeve tops, bottoms, turtlenecks, hoodies, tanks and more. Made in Minnesota from fabrics manufactured in Minnesota and Colorado.

Duckworth made in USA base layers for women are made from Montana source merino wool. Tops can be worn solo or as a base layer. Also offers skier's leggings and base layers with hoods.

Kenyon's women thermals are available in choice of fabrics including polyester, silk weight, Polartec®, fleece, and more. Selection includes bottoms and tops.

Kurve makes form fitting long and short sleeve inner layers as well as leggings in Los Angeles. This line is more fashion oriented than performance oriented, but their fitness and dance lines may provide all-season service as cold weather inner layers. Visit the Kurve store on Amazon.

Rambler's Way wool leggings are made in Maine from Rambouilet Merino wool. Wool Camisole and crew neck long sleeve tops are also available for a complete base layer set.

WSI Sportswear base layers for women include leggings, long sleeve crews, hoodies and more. Available in fun patterns and high performance materials that keep in warmth, wick moisture, and control odors.

Wuru base layers are made in USA from Nuyarn® Mernino wool. The wool is sourced from around the world and the fabric is knit in Vietnam. The clothing is cut and sewn in the USA. Leggings are available too.

Corbeaux has baselayer tops and bottoms for kids now too! Hand sewn in Minnesota, these base layers come in fun colors and patterns that kids will love. Many of their pieces have UPF sun protection of 30 or 50.

Kenyon polyester thermals for kids are unisex sizes and made in Rhode Island.

Corbeaux offers a line of base layers in youth sizes. Items include leggings, long sleeve crew, and hoodie. They are unisex, tag-less, and contain a natural SPF.