48% Polyester / 48% Recycled Polyester / 4% Elastane. 1/2 Zip. Self Collar. Short Sleeve. Stretch. Upf40 Protects Skin From The Sun. Made With 30% Recycled Polyester. Machine Wash. Opti-Dri™. Transfers moisture away from your body to keep you cool and dry.. Swing Tech™. Made to maximize your range of motion on every swing, Swing Tech provides noticeably less restriction through re-engineered construction and materials.