Prudent layering pays off bigtime when bone chilling weather presents itself, and the Grundies(TM) base layer collection was designed to help you retain a vital resource, body heat. Offering a variety of material weights combined with HeiQ(TM) Anti-odor properties the Grundies(TM) collection provides a modular layering system that can be worn in many combinations depending on the conditions you&&';;re facing. Thermal Base Layer Performance Top HeiQ Anti Odor Properties Moisture-Wicking Enhanced Fabric Non-Pilling Zippered Chest Pocket 3M reflective chest logo Chin guard UPF 50 Sun Protection 222g/m^2 50% NYLON / 41% POLYESTER / 9% SPANDEX with brushed back Machine wash at 40Adeg F Wash with like colors Tumble dry low Do not iron Do not dry clean Do not use bleach