This activity bag has a roll-top closure and is fully seam-sealed.250 denier polyester tarpaulin with waterproof coating on both sidesDetachable adjustable shoulder sling strapNot intended to be submersible due to roll-top closureRoll top tightly 4 times and clip closed for bbest water-resistant performanceNot recommended for electronics without double-bagging inside waterproof pouchesDimensions: 20 h x 12 w Approx. 1 080 cubic inches; 9 w x 6 d oval-shaped bottom resists rollingTo maintain optimal water resistance special care must be taken when decorating. Low-heat or non-heat decoration suggested and test prior to decorating. Embroidery not recommended. *Bags not intended for use by children 12 and under. Includes a California Prop 65 and social responsibility hangtag.