Seobean Men's Thermal Long Johns — 87% Nylon Sport

Seobean Thermal Long Johns — 87% Nylon / 13% Spandex Sport Fit

These thermal long johns from Seobean are built for men who want warmth without the bulk. The 87% Nylon / 13% Spandex blend delivers a snug, compression-like fit that moves with your body — whether you're hitting the slopes, going for a winter run, or simply keeping warm at home. Unlike cotton thermal underwear that traps sweat, the nylon fabric wicks moisture away from your skin, keeping you dry during active use.

Why Nylon for Thermal Wear?

Nylon is naturally quick-drying and highly durable. In a thermal garment, that means you can stay warm without feeling damp — even after a high-output workout in cold weather. The 13% Spandex ensures the pants stay close to your body, creating a second-skin layer that traps heat without restricting range of motion.

Four Colors for Every Style

Available in Navy, Pink, White, and Yellow Green — each colorway features a colorful elastic waistband that adds a sporty accent. Whether you prefer classic Navy or want to make a statement in Pink or Yellow Green, these long johns deliver warmth and personality in equal measure.

Versatile Enough for Any Winter Activity

Wear them as a base layer under jeans or snow pants, or lounge in them at home. The full-length cut covers from waist to ankle, and the stretch fabric accommodates everything from deep squats to couch-time comfort. Machine washable and built to last through many winters.