Features of the ExOfficio Women's Balandra Long Sleeve Lightweight stretch-nylon is abrasion-resistant and durable econyl nylon fabric is made from recycled ocean plastics Ultraviolet Protection Factor (UPF) 45 Stretch fabric for comfort and ease of movement Vents on shirt back help keep you cool Forward set shoulder seams for comfort with or without a backpack Internal zippered passport pocket on right side Collar adjusts to three heights for sun protection Sunglass cleaner chamois patch inside bottom left placket Flatlock seams won't bind or chafe Sleeves roll up and secure with tabs Fabric Details 50% Recycled Polyester 45% Econly Regenerated Nylon 5% Elastane