Men's Dual Layer Long Sleeve Union SuitPortable Heateresa

Reliable Heat Retention Our men’s thermal underwear features a dual-layer design with Merino wool fabric, effectively trapping body heat between layers. This innovative construction creates a natural barrier that blocks chill and ensures warmth even in the coldest conditions.

Relaxed Fit Our tagless thermal underwear boasts a generous fit, providing ample space for a full range of motion. The tagless design and flat seams ensure a soft, smooth next-to-skin feeling, making it an excellent choice for all-day comfort.

Comfort-Driven Design Our romper-style men’s long johns feature a comfortable one-piece construction with a full-button front and strategically placed gussets. A one-button vertical flap seat with branded, horn-style buttons adds a touch of elegance while enhancing comfort and functionality.

Comprehensive Cold Weather Protection Our thermal underwear is perfect for weathering very cold to extremely cold conditions during low- to medium-exertion activities such as hiking, camping, and even lounging. The design ensures you stay warm and comfortable in any chilly environment.

Versatile Sizing Our men’s one-piece long johns cater to a wide range of sizes, available in regular S to 2X, ensuring a perfect fit for all men.

Tagless Full Cut One Piece For Comfort with Flat Seams Enjoy a tagless, full cut one-piece design with flat seams that ensure a soft, smooth next-to-skin feeling, enhancing overall comfort.