Built to handle all-day in the sun , the Performance Crew L/S provides optimal protection and comfort when the sun threatens to cut your time short. Breathable mesh on the back and underarms works to keep you cool from sun up to sun down. The Performance Crew L/S is engineered with our Shield 4™ technology to guarantee all-around protection from the elements.Materials• 92% polyester / 8% spandex blended fabric with four-way stretch• 100% polyester mesh fabric with mechanical stretch on back and underarmsFeatures• Breathable mesh back and underarms• Shield 4 Sun™ UPF 50+ sun treatment• Shield 4 Coolant™ treatment• Shield 4 Odor™ treatment• Shield 4 Stains™ treatment