Product name: Children's life jacket. Whether in the pool, beach or boat, children can move and swim freely, and if they learn to swim, it will build confidence and develop skills. valuable water safety habits they can use for a lifetime. For added peace of mind, the Original Puddle Jumper's safety buckle snaps in the back to prevent children to remove the vest by themselves; be sure to tighten the adjustable straps for a secure fit. Nylon shell for durability Fun design makes water safety fun for kids Gives beginners confidence when learning to swim. Applicable age: 2-6 years (10-30KG) PVC Thickness: 4CM Season: All Seasons Gender: Child Due to the different measurement methods, please allow 2-3cm error of measurement. Due to shooting tools and lighting problems, please allow color difference between picture and product.