Double Airbag Swimming Buoy Floating Mark Detachable Shoulder Waterproof BackpackOverview: 1. Backpack Swimming Bag: One bag for dual use, relieves your burden, and can be in close contact with nature at any time. 2. Dual Airbags: Dual airbags, have enough buoyancy and safer to use. When one airbag, unfortunately, leaks, the other airbag can still maintain buoyancy to ensure safety. 3. Large Storage Space: Its volume is 28L and 35L, which can easily accommodate your clothes and other items. The fully waterproof design allows you