• Reliable Heat Retention: Dual-layer engineering with Merino wool fabric traps body heat between layers to provide a chill-blocking natural barrier of warmth
• Relaxed Fit: Our tagless thermal underwear for men boasts a generous cut that allows for a full range of motion; A tagless design and flat seams ensure a soft, smooth next-to-skin feeling
• Comfort-Driven Design: Men’s romper-style longs johns feature a comfortable one-piece construction complete with a full-button front and gussets, plus a one-button vertical flap seat with branded, horn-style buttons
• Combats Cold Conditions: Our men’s thermal underwear helps you weather very cold to extremely cold conditions during low- to medium-exertion activities like hiking, camping, and even lounging
• Versatile Sizing: Our one-piece long johns for men are available in regular sizes S to 2X
• Tagless Full Cut One Piece For Comfort with Flat Seams