Abstract: An inflatable structure includes a fabric body having three hydrophilic and vapor-transmissible plastic layers sequentially applied over an inner surface thereof, and including at least one continuous S-shaped bonding channel, along which areas on an outer surface of the fabric body at two opposite sides thereof are bonded together. The three hydrophilic and vapor transmissible plastic layers are lightweight, waterproof, vapor transmissible, and warm; and the S-shaped bonding channel has small width to allow increased inflatable space in the fabric body. The continuous S-shaped bonding channel has two ends formed into two closed circular bonding lines to avoid damage of the inflatable structure by stress concentrated at the bonding line.

Abstract: An inflatable structure includes a hollow fabric body having three hydrophilic and vapor-transmissible plastic layers sequentially applied over an inner surface thereof, and including at least one continuous S-shaped bonding line, along which areas on an outer surface of the hollow fabric body at two opposite sides thereof are bonded together. The three hydrophilic and vapor transmissible plastic layers are lightweight, waterproof, vapor transmissible, and warm; and the S-shaped bonding line has small width to allow increased inflatable space in the hollow fabric body. The continuous S-shaped bonding line has two ends formed into two closed circular bonding lines to avoid damage of the inflatable structure by stress concentrated at the bonding line.