ColdPruf Men's Quest Performance Base Layer Long Sleeve Mock Neck Top 85% Polyester/15% Spandex Imported Our most versatile layer, great for base layer, casual wear, or active wear Mock turtleneck with elastic thumbhole loop in sleeves for ease in layering Drop tail maintains coverage in various activities Tagless labeling and flat seems provide a smooth fit and extra comfort Moisture management wicks perspiration and dries quickly Featuring ColdPruf Technical Fiber formulated with Silvadur Intelligent Freshness to minimize odor and odor causing bacteria on fabric