Abstract: A life jacket has two head air bags, a plurality of shoulder air bags, a zipper disposed between the head air bags, and a plurality of pockets. Each of the pockets receives an inflated bag. A safety pin is disposed on the inflated bag. An air inlet hose is connected to the corresponding shoulder air bag and a pressing ball. Each of the head air bags has a hook-and-loop type fastener.

Abstract: A foldable hula hoop structure includes multiple arcuate connecting members combined with each other. Each of the arcuate connecting members includes two opposite flexible main bodies combined with each other. Each of the two opposite main bodies has a first end and a second end respectively provided with convex portions and mating concave portions, so that any two adjacent arcuate connecting members may be combined with each other by engagement of the convex portions with the mating concave portions. Each of the convex portions and the mating concave portions is formed with a through hole for passage of a first locking member which is locked with a second locking member, so that any two adjacent arcuate connecting members may be combined with each other by the first locking member and the second locking member.

Abstract: A life jacket has two head air bags, a plurality of shoulder air bags, a zipper disposed between the head air bags, and a plurality of pockets. Each of the pockets receives an inflated bag. A safety pin is disposed on the inflated bag. An air inlet hose is connected to the corresponding shoulder air bag and a pressing ball. Each of the head air bags has a hook-and-loop type fastener.

Abstract: A life jacket has a plurality of shoulder air bags, a zipper disposed between the shoulder air bags, and a plurality of pockets. Each of the pockets receives an inflated bag. A safety pin is disposed on the inflated bag. An air inlet hose is connected to the respective shoulder air bag and a pressing ball. Each of the shoulder air bags has a hook-and-loop type fastener.

Abstract: A mold assembly has an upper positioning seat, an upper panel disposed in the upper positioning seat, a lower positioning seat, a lower panel disposed in the lower positioning seat, a first air cylinder disposed on a side of the lower positioning seat, a second air cylinder disposed on a bottom of the lower positioning seat, a third air cylinder disposed on a side of the upper positioning seat, and a fourth air cylinder disposed on a top portion of the upper positioning seat. A lower plate is disposed on a bottom of the upper panel. An upper plate is disposed on the lower panel. The lower plate engages with the upper plate.

Abstract: A sandal device has an outsole, an air cushion, and an insole. The air cushion has two periphery flanges, a periphery spacing, a plurality of hollow protrusions, and a plurality of hollow sockets. An elastic woven fabric and a shock-absorbing band are inserted in the periphery spacing of the air cushion. The shock-absorbing band has two periphery recesses for receiving the periphery flanges of the air cushion. Each of the hollow protrusions has a groove for receiving a magnetic block and a collar. A coiled spring has a lower portion inserted in the respective hollow socket and an upper portion inserted in the respective collar.

Abstract: A replaceable elastic air cushion shoe structure includes a sole, and a vamp. The sole has a top provided with a plurality of oblique conical locking grooves and having a periphery provided with a plurality of waterproof ribs. The sole has a periphery defining a plurality of locking recesses each provided with a catch piece. The vamp has a bottom provided with a plurality of oblique conical locking blocks each locked in the locking groove of the sole. The bottom of the vamp defines a plurality of waterproof slots for receiving the waterproof ribs of the sole therein so that the vamp is integrally formed with the sole. A plurality of U-shaped snapping pieces are each secured in the bottom of the vamp and each have two sides each provided with a hook.

Abstract: An elastic shoe pad has an elastic seat and a positioning seat engaging with the elastic seat. The elastic seat has an elastic plate, a plurality of connecting bars disposed on a bottom of the elastic plate, and a plurality of elastic tubes connected to the connecting bars. The positioning seat has a plurality of hollow chambers matching the elastic tubes, and a plurality of upper slots communicating with the hollow chambers. The elastic tubes are inserted in the hollow chambers. An outsole has an upper periphery flange. The elastic shoe pad is disposed on the outsole. The upper periphery flange encloses the elastic shoe pad.