ColdPruf Men's Basic Dual Layer Long Sleeve Crew Neck Base Layer Top 60% Combed Ring Spun Cotton/40% Polyester Imported Soft, cotton two-layer engineering traps body heat between layers resulting in chill-blocking warmth Drop tail and stay-put rib cuffs maintains coverage in various activities Tagless labeling and flat seems provide a smooth fit and extra comfort Fits loose on the body, generous cut for full range of motion Perfect as a base layer or on its own. Best for dressing with minimal layers in cold to very cold weather and low to medium activity levels