I purchased this and tried to use it a few times, but it didn't suit my children, so I've been storing it at home. It can be used in various situations, such as a swim ring or during bath time. The pump is missing, as it was stored at home, and the guide has quite a few creases. The main body has no holes and can be used without any problems! The oval-shaped hole that follows the shape of the body fits the body perfectly. The secret of the vertical design is that the arms can move freely, making it easier to paddle. It provides a sense of stability by securely fixing under the armpits, making it the first step in swimming practice. It has a safe two-layer structure, so even if air leaks from one side, it won't sink suddenly. Baby size: 6 months to around 2 years old. Best for when they can roll over and sit up, and when they start crawling or walking! They can develop a sense of balance by floating in the water and exercise while being supported by buoyancy. ＜Set Contents＞ Body ring, Japanese official guide ＜Main Materials＞ PVC plastic - Brand: Swimava - Design: Penguin design - Color: White/Black/Pink - Size: Free size - Features: Can be used as a swim ring Thank you for viewing.