1.PVC mesh cloth makes this storage pack a waterproof durable dry bag
2.Seamless sewing is uneasy to leak the water or air, which brings more waterproof guarantee when you are using this dry bag
3.The buckled opening makes it easy to get in and out of as needed
4.To keep water out, you just need to roll this dry bag correctly and then twist the ends once more to tighten the seal before making it buckled.