Baby swimming ring: environmentally friendly PVC material, waterproof and durable. No skin damage and no sharp parts, non-slip, safe, close contact with baby's skin, safe and secure. Materials and designs comply with international toy safety standardsSize Options: Our infant swim stroller fits children from 3 months to 6 years old. Please refer to the second picture to choose the right size for your baby. Or you can contact us and we will recommend the size suitable for your baby.Safety Warning: If baby slips out of the baby float or the baby float is too large for baby's body, adjust the baby swimmer's inflatable chest support. If it still doesn't work after multiple settings, please stop using it or choose a smaller sizeUNIQUE DESIGN: Unlike traditional baby swimming strollers, it is equipped with an inflatable lumbar support and adjustable safety belt, allowing babies to maintain a perfect posture and learn how to swim and kick in the water with their legs just like the traditional upright designNOTE: Use only in water where children are within the depth range and under adult supervision. Every product is gas tested. The inflation saturation is about 80%-90%, which is the most comfortable state. You don’t need to inflate too much. It is enough to inflate the abdomen to 50% and the safety chest pad to 20%-30%.