Ready for whatever adventure your summer day brings. The lightweight nylon spandex material of the Rivers Short Sleeve Shirt is quick-drying, wicking, and gives you protection from the sun with a Upf 30+ rating. You'll stay comfortable thanks to a vented back yoke and flip-n-snap collar for neck protection. One chest pocket with side entry zippered access, plus a sunglasses loop at the pocket corner and sewn-in sunglasses chamois cloth on the interior hem for endless hours in the sun.91gsm, 84% Nylon, 16% Spandex4-way stretch for mobilityUPF 30+Quick-dry andamp Wicking for moisture controlVented back yoke for breathabilityFlip-n-snap collar for sun protectionSunglass chamois set inside side seam on wearer s right hemDouble entry chest pocket. Top drop in pocket with button flap closure and side entry with zipper closureUtility loop on wearer s left chest pocketBranded dyed to match buttonsMK Icon embroidery on back yokeClip label on interior placketMen's Size Chart