The Kids' Patagonia Capilene Silkweight Hoody body fabric is made from stretchy recycled polyester and spandex jersey with 40+ UPF sun protection. A three-panel hood with a tall collar provides a nice fit and additional coverage for the neck, while rolled-forward shoulder seams prevent chafing under backpack straps, and underarm gusset panels keep the hoodie from pulling up for comfortable mobility. The thumbholes in the cuffs keep the sleeves from riding up when playing or layering.