The Pack-it is our boys Outdoor Adventure unlined packable overtrouser designed for wet weather fun. The rainy weather fighters are made from our Isolite fabric with lightweight, waterproof, breathable and wind resistant powers. The handy stuff sack is perfect for stowing away in school bags. Pair with the matching Pack-it Jacket for full protection. 100% Polyester. Regatta Kids Sizing (waist approx): 2 Years (52-53cm), 3-4 Years (53-54cm), 5-6 Years (55-57cm), 7-8 Years (58-60cm), 9-10 Years (61-64cm), 11-12 Years (65-67cm), 26" (68-70cm), 28" (70-72cm). Ref: UTRG686