Backpack and stacked bag become a float and its handles are cross-shaped as a cross (Machine-translation by Google Translate, not legally binding)

摘要

The backpack and stacked bag, according to claim 1, is characterized by being made of waterproof materials such as latex, neoprene, rubber, plastic, flexible plastic, poly-urethane, latex vinyl, woven vinyl, nano-fabric, recycled plastic, plasticized fabric, polymer, polyethylene, flexible plastic, composed of metallic matrix floating in water, impermeable material, or hydrophobic material. (Machine-translation by Google Translate, not legally binding)