Lightweight and H2Oproof storage the Exped Fold-Drybag CS bags feature fold-n-roll closure. Made of durable and pliable PU-coated Taffeta nylon. 10,000mm H2O column and fully taped seams. Quick release buckle and grab handle (except size XXS). DWR treated closure webbings. Bright inner PU coating lights up the interior of the bags.