The Back On Track Men's Base Layer ""Isaac"" is a versatile thermal underwear set designed for active men who seek comfort and performance in cold weather. Crafted from a thin tricot fabric infused with Welltex®, this base layer offers a soft, moisture-wicking experience that regulates body temperature during movement.Made from thin tricot fabric for a lightweight feelInfused with Welltex®technology to reflect far-infrared energyMoisture-wicking properties keep you dry during sports and exerciseRibbed cuffs at the ankles for a snug fitIdeal for both active use and as comfortable sleepwear Whether you're riding, training, or simply relaxing at home, the Isaac base layer envelops you in warmth and comfort, making it an essential addition to your wardrobe.