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 features built-in sun protection. A mesh-lined back vent keeps her cool when the mercury climbs; collar flips up for added protection from the sun. And when it`s time to roll up her sleeves and play a button-tab secures the sleeves at the elbow. Two front chest pockets.FEATURES: Summit Cloth with Omni-Wick Advanced Evaporation Wicking Quick Drying Breathable Lightweight Omni-Shade UPF 30 Sun Protection Vented Roll-Up Sleeve Tabs Mesh Lined Sun Protection CollarOmni-WickThis moisture transferring technology moves and disperses sweat away from the body for quick evaporation keeping you comfortable during physical activity.Omni-Shade and UPFUltraviolet Protection Factor (UPF) is a measure of the percentage of ultraviolet sunlight thatColumbia