The Marmot Girls' Ani Short is a nylon short for running around outside all summer long. The lightweight nylon holds up to dirt, abrasion, and dries quickly when she spontaneously runs through the neighbor's sprinkler. The fabric provides UPF 40 to protect against the hot sun and also wicks moisture away from her skin, keeping her cool and comfortable. The usual hand pockets, plus a side pocket with zipper closure, contain her treasures found throughout the day. Did you know you can make a whistle out of an acorn lid? I think my family is still annoyed by that discovery.