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Use ANUNEW for 10% OFF Your First Purchase!

Most orders under $99 ship from $9.99

Free Shipping on Most Orders Over $99

Home > Apparel > Undergarments

Thermal Underwear & Base Layers for Every Season

Stay comfortable in every season with premium thermal underwear, base layers, and undergarments at ArmyNavyUSA. Shop boxer briefs, briefs, tank undershirts, performance underwear, sports bras, and moisture-wicking thermal apparel from trusted brands like Rothco, Hanes, Carhartt, Fruit of the Loom, and Indera Mills. Designed for military use, outdoor adventures, work, training, fitness, and everyday wear, our collection delivers breathable comfort, dependable warmth, moisture control, and long-lasting durability in any environment.


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Apparel

Shirts (15)
Undergarments (82)
Tank Tops (15)
T-Shirts (5)
Boxers Briefs (4)
Thermal Base Layers (52)
Vintage Shirts (1)
Undershirts (5)
Women Apparel (11)

Brands

Carhartt (7)
Hanes (7)
Rothco (52)
Snap N Wear (1)
Indera Mills (12)

Carhartt

Carhartt Apparel (7)

Color

Black (24)
Brown (2)
Urban Camo (1)
Coyote (7)
Gray (2)
Khaki (3)
Navy (5)
Olive Drab (2)
Red (1)
Tan (4)
Tiger Stripe Camo (2)
White (18)
Woodland Camo (6)
Wheat (2)
Midnight Digital Camo (1)
Desert Sand (1)
Sky Blue Camo (1)
Coyote Brown (1)

Features

Insulated (1)

Materials

Cotton (34)
Dacron (1)
Nylon (1)
Polyester (23)
Cotton - Polyester (16)
Spandex (5)

Size

X-Small (4)
Small (73)
Medium (73)
Large (73)
X-Large (72)
2X-Large (71)
3X-Large (28)
4X-Large (1)

Gender

Men (41)
Women (11)
Unisex (29)

NY Guard

OCP Accessories (1)
OCP T-Shirts (1)

1. Find the Right Undergarments for Every Activity

Explore thermal underwear, base layers, boxer briefs, undershirts, and performance essentials designed to deliver all-day comfort, support, and dependable durability.

2. Premium Thermal Underwear for All Seasons

Stay warm in cold weather and comfortable year-round with breathable thermal tops, bottoms, and moisture-wicking base layers built for lasting performance.

3. Built for Work, Military & Outdoor Use

From military training and demanding jobs to hiking, camping, and everyday wear, our durable undergarments provide reliable warmth, comfort, and performance in every season.

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