High-performance jersey designed to deliver unparalleled fit & cooling comfort PRO Transfer fabric moves moisture off your skin to keep you dry Sleeve/shoulder panels use PRO Transfer fabric powered by coldblack for optimal cooling & reflective sun protection Direct-Vent panels provide superior ventilation Patented anatomic Speed Sleeve construction Full-length semi-autolock zipper can be flipped up & tugged open with one hand for easy venting Three back pockets plus sweat-proof security pocket Structural mesh panel on back for pocket support Bio Viz&9516;& Ouml; reflective elements for low-light visibility Form Fit Weather Forecast: Hot & sunny Temperature Rating: 20 to 35 degrees Fabrics: Body is 87% polyester 13% elastane/ UPF 50+ Sleeves are 80% polyester 20% elastane/ UPF 40+ & Mesh panels are 100% polyester