Stay on course when the weather cools with this base layer golf top from Callaway. Ventilated fabric with cooling technology circulates air through this long sleeve golf shirt and Opti-Dri™ technology wicks moisture away from your skin to keep you cool and dry. Swing Tech™ fabric with added stretch allows for a full range of motion. A mock neck collar provides additional protection from the wind so you can play through in comfort. 84% Polyester / 16% Elastane Upf40 Sun Protection Fabric Thermal Insulation Model Is 6'1" And Wears Size Medium Machine Wash Swing Tech™ Made to maximize your range of motion on every swing, Swing Tech provides noticeably less restriction through re-engineered construction and materials. Opti-Dri™ Transfers moisture away from your body to keep you cool and dry.