Tagvo 10L Lightweight Waterproof Dry Bag with Shoulder Strap + Free Waterproof Phone Case,Waterproof Floating Bag Backpack for Kayaking Boating and Other Outdoor Adventures 500D thick PVC,strong waterproof floating dry bag can protect your high value belongings from the water,sand and dust. Lightweight and durable,and the sack backpack has big capacity 10L,enough to storage .Easy to use and clean. The shoulder strap is adjustable.You can adjust the strap and even remove the strap freely. Underwater bag for floating and rainfall ,but do not submerge for long time. FREE GIFT.Dry bag perfect for your smart phone,wallet,and your key during in water.