48% Polyester / 48% Recycled Polyester / 4% Elastane. Stretch To Give Full Range Of Motion. V-Neck. Callaway Logo To Back. Opti•Dri™ Wicks Away Moisture To Keep You Dry. Swing Tech™. Made With Recycled Polyester. Model Is 5'7 And Wears Size S. 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.