The Coldpruf Men's Tall Basic Midweight Crew Shirt is a base layer underwear garment, designed to trap air between its two layers, providing a natural barrier of warmth. The two layer engineering delivers comfort and warmth in all cold weather environments, at home, on the job, or enjoying the outdoors. The Men's Tall Basic Midweight Crew is designed for wear in cold to very cold temperatures during low to medium activity. Two layer construction with both the inside and outside layers being a blend of 60% ring spun cotton and 40% polyester. Two layer engineering provides a natural barrier of warmth. Ring spun cotton provides exceptionally soft hand feel. Drop tail construction for better fit. Tails are 2 longer than regular size. Sleeve length 1.5 longer than regular size. Rib cuffs. Flatlock construction on all seams. Tagless for additional comfort. Excellent thermal qualities in a variety of weather conditions during low to medium activity. Avg. weight: 6 oz. Import.