Divonea waterproof bag, versatile: 1) waterproof bag 28 L, closure 3 turns / 1 click closure, consisting of wrapping the waterproof bag 3 times on itself, optimal system for waterproof protection of things (keys, portable, wallet, clothes) in your bag sea bag. After rolling up the MER BAG bag, the seal is reinforced by 2 rigid slats of the flap and the clip closure, which also allows attachment or attachment to a fixed holder. 2) Float: The sea bag is equipped with a hose with a one-way valve (inflatable/deflatable) to turn the waterproof bag into a safety device when swimming in open water. In float mode, you are clearly visible to boats, kite surfing, jet ski, paddle and other boats in the area, keeping your personal items dry and so close to you. Includes lead and adjustable belt [64-122cm]. 3) Warning ring diver: by inserting the diving flag and by inflating the waterproof compartment of the sea BAG, you can transform the float into a regular diving buoy (height 50 cm) type torpedo. 20 meter lead with swivel snap hook included for safe hunting, apnea or snorkeling.