Indera Performance Rib Knit Thermal underwear for men is sure to keep you comfortable and warm, whether you're hitting the slopes, working outside, or just lounging around the house. With high-performance moisture-wicking fabric of cotton thermal undershirt, the remarkable Silvadur technology will control body odor even during exercise. Indera Mills has spent the past 107 years perfecting the art of warmth outdoors. Our longevity is a result of staying true to our goal of keeping our customers warm since 1914. Our values of hard work, trust, and commitment to family, community, and American ingenuity are why Indera is one of the largest thermal underwear suppliers in the USA