Seobean Color Block Long Johns — 92% Cotton / 8% Spandex Thermal Underwear

Stay warm and comfortable this winter with these color block long johns from Seobean. Made from 92% Cotton with 8% Spandex for stretch, these thermal pants provide soft, comfortable insulation for cold-weather layering or lazy weekends at home. The color block design adds modern visual interest to a classic winter essential.

Cotton Comfort, Winter Ready

With a thick cotton fabric as the base, these long johns trap warm air against your body while letting your skin breathe naturally — no overheating, no clammy feeling. The 8% Spandex gives you freedom of movement whether you're bending, squatting, or lounging on the couch, without the fabric bagging out at the knees.

Color Block Design — Functional Meets Fashionable

Available in Red, Blue, and Black, each colorway features a distinctive color block pattern that sets these apart from plain thermal underwear. Wear them as a cozy base layer under jeans or trousers, or rock them solo for a relaxed at-home look. The elastic waistband sits comfortably and stays put through a full day of wear.

True-to-Size Fit from S to XXL

These long johns are available in five sizes from S to XXL, with a size chart based on waist, weight, and height to help you find your perfect fit. Machine washable for easy care, they're built to last through many winters to come.