Indera Men's Cotton Waffle Knit Heavyweight Thermal Underwear Top 100% cotton provides advanced comfort and warmth Heavyweight waffle knit traps and retains body heat Tagless labeling and rib cuffs for extra comfort Shrinkage controlled material Perfect for very cold temperatures and medium activity levels Traps & Retains Body Heat Waffle Knit 100% Heavyweight Cotton For Comfort and Warmth Very Cold Weather Medium Activity