This hard-working shirt is built to keep up with even the most energetic little trekker. Lightweight, durable nylon fabric both pulls sweat away from skin and reatures built-in sun protection. A mesh-lined back vent keeps he cool when the mercury climbs; collar flips up for added protection from the sun. And when it's time to roll her sleeves up and play, a button tab secures the sleeves at the elbow. Two front chest pockets. FEATURES: Shell: 100% nylon Summit Cloth. Lining: 5% recycled polyester/43% polyester mesh, Omni-Shade UPF 30 sun protection, Omni-Wick, Vented, Quick dry, Roll-up sleeve, Mesh lined, Sun protection collar, Imported,