Keeps Gear Dry: Zipper-top duffels can't seal out driving rain. That's why we designed our DuffelSak with a tighter roll-down top. Roll it 3-4 times, then clip shut for IPX-6 waterproof protection. Built To Withstand Hard Wear: DuffelSak Dry Bag comes in heavy duty 500D PVC with watertight high-frequency welded seams. It can take whatever you & Mother Nature dish out! Lots Of Room: Never fear! This spacious duffel fits everything from clothes & swimsuits to phones, laptops & cameras. It has 2 interior zip-pockets PLUS 2 outer zip splash-proof pockets. Available in 40L, 60L & 90 sizes.