Warm Wear / Merino Wool

Thermal Men's Long Sleeve Union Suit

$ 75.31 $51.21
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All The Features & Benefits Simplified


Reliable Warmth Our dual-layer thermal underwear uses Merino wool to trap body heat, providing a natural barrier against the cold. Say goodbye to chilly days and nights.

Relaxed Fit Enjoy a comfortable, loose fit that allows full freedom of movement. Our tagless design and flat seams ensure a soft, smooth sensation next to your skin.

Comfort-Driven Design Our men’s romper-style long johns offer a comfortable, one-piece construction. Features include a full-button front, gussets, and a one-button vertical flap seat with branded, horn-style buttons.

Combats Cold Conditions Designed to keep you warm during low- to medium-exertion activities like hiking, camping, or relaxing at home. Our thermal underwear is perfect for very cold to extremely cold conditions.

Versatile Sizing Available in regular sizes from S to 2X, our men’s thermal underwear ensures a perfect fit for everyone.

Tagless and Comfortable Experience the comfort of a tagless design and flat seams.

Proven Performance Our product is specifically designed to help you stay warm and cozy in cold environments.