UPF 50+ rated fabric with mesh panels for venting. 2-way stretch main body with 4-way stretch panels. Articulated sleeves for better range of motion. 2 large chest pockets with mesh back for venting. Sunglasses chamois inside bottom hem. Machine wash and dry. See garment label for details.Fabric Tech: Main Body: 78% polyester 22% nylon; Side Panels: 91% polyester, 9% nylon.