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The Coldpruf Men's Enthusiast Polypropylene Lightweight Tall Crew Shirt is a single-layer garment made out of 100% polypropylene, engineered to give a close comfortable fit without being restrictive. The Enthusiast is lightweight and designed to give thermal protection in cold to very cold weather with medium to high activity. Great for camping, hiking, skiing or any activity where added warmth benefits an active lifestyle.100% ring spun polypropylene.Ring spun polypropylene yarn gives the fabric a luxurious, soft feel.Drop needle construction provides a close comfortable fit.Tops have a drop tail construction for better fit.Tails are 2 inches longer than regular size.Sleeve length is 1? inches longer than regular size.Rib cuffs. Flatlock construction on all seams.Provides excellent moisture management.Excellent thermal qualities in a variety of weather conditions.Avg weight: 5.5 oz.Import.