Swimming jackets are designed to provide enough buoyancy to help keep the wearer afloat in water. jacket is made of PVC material, which is durable and water-resistant. The jacket is designed to fit comfortably on the wearer, with adjustable straps to ensure a secure fit and allows children to move freely in the water without feeling restricted. he jacket is designed to be easy to put on and take off with a buckles. This kids' swim jacket inflates and deflates easily. Water Sports, Pool Games, Aqua Fun. Now get in the pool with this amazing swimming vest for some splashing fun.