Made up of UPF 50 sun screening fabric our Solar Jet jerseys provide maximum protection from the suns harmful rays a wide array of functional details that make them our highest performing spring jerseys. Reflexsun technology uses unique microdenier polyester provides UPF 50 protection Hydrophobic wicking material for comfortable dry performance Full-length semi-locking zipper for convenience comfort & temperature regulation External Specialized logo gripper at the bottom prevents slippage Three ergonomic back pockets to store essentials & with additional welded security pocket Sleeve openings use soft stretchy fabric instead of elastic to keep sleeves in place more comfortably Slightly higher neck for additional sun protection Convenient wiring ports for personal electronics