Humanized design, with a pillow saves on the need to separate out with a pillow, and comfortable and convenient.It can design together, be spliced into a double, can also be 3 people, 4 people, infinite joining together.Use in spinning fabrics, more wear-resisting, comfortable, ABS gas mouth, durable.Automatic inflatable is 2.5 cm, not afraid of underground moisture, still can lock.Patches, accidentally cut blow-up lilo, pastes the easier.