Thermal Shirts
Base Layers • Thermal Crews • Cold Weather
The foundation of any cold-weather layering system. Our thermal shirts and base layers trap warmth against your skin and wick moisture away — from premium Duofold by Champion crews to value heavyweight cotton thermals and polypro undershirts. Warmth without the bulk, priced from $9.95 and shipped fast from Pennsylvania.
Thermal Shirts at Keep Shooting
A good base layer is the difference between a miserable cold day and a comfortable one. Our thermal shirts trap body heat and wick sweat away from the skin so you stay warm and dry — the foundation of any layering system, and part of our shirts lineup under clothing.
Duofold Base Layers & Thermal Crews
Duofold by Champion practically invented the double-layer thermal. We carry the classic Originals thermal crew, the insulating THERMatrix crew, and the brushed-back Varitherm base layer, up to the heavyweight Expedition base layer for the coldest days.
Value Thermals & Undershirts
For everyday warmth on a budget, the Cotton Plus heavyweight thermal starts at just $9.95, the KCP polypro rib undershirt delivers moisture-wicking synthetic warmth, and the Mil-Tec sport shirt doubles as a light active base layer.
Everything ships from our Pennsylvania warehouse with free shipping on orders over $49.95. Building a cold-weather kit? Pair a base layer with the rest of our shirts, or shop genuine ECWCS thermals in our military surplus shirts.
Frequently Asked Questions — Thermal Shirts
Keep Shooting carries a wide selection of Thermal Shirts products from trusted brands. Browse our catalog to see the full range, and use the filters on the left to narrow by brand, price, or product type.
Yes! All orders over $49.95 qualify for free shipping, including Thermal Shirts products. Orders typically ship within 1–2 business days.
Keep Shooting offers hassle-free returns on Thermal Shirts products. If you're not completely satisfied, contact our customer service team for a return authorization. All products must be in original, unused condition.
If you need help choosing the right Thermal Shirts product, our team is available to assist. Check individual product descriptions for detailed specifications, or contact us directly and we'll help you find the best fit for your needs.