Target Audience:Suitable for children from 3 months to 3 years old. Please refer to our product image with the dimension. Great design: The baby can kick and push the sides of the buoy. The front of the buoy keeps its head well away from the water. Convenient and simple: easy to inflate and deflate. Folds easily for storage and transport. Dual stage air chamber design. Please inflate the small inner tube first, then the large one. Premium Quality: 0.35mm thick PVC material. The design of the vest is adjustable for more comfort. 40-degree armpits allow baby to learn to swim, and a back float helps prevent rollovers ;Be careful not to inflate the buoy excessively (80%-90% inflation is sufficient).