piranha Surface waterproof specificationPiranha backpack for kids¥7,480Price配送料QuantityAdd to CartPRODUCT INFO100% cotton Water proof SIZE GUIDEfor kid: 52 cm x 34.5 cm (usable space 37 cm x 34 cm) for adults: 74 cm x 18 cm (usable space 53 cm x 47 cm)