Under Armour Men's Tech S/S Tee Imported Machine Wash Lightweight UA Tech fabric - Has a softer, more natural feel, for incredible comfort. HeatGear Fabric - Offers stretch and flexibility. 4-Way Stretch Construction - Improves your mobility and accelerates drying time. Superior Moisture Transport System - Helps to keep you dry, comfortable and cool. Raglan Sleeve Construction - Allows for full range of motion without chafing.