The vest from the Jolie The Octopus collection by Monnëka by Tutete features a safety strap to place between the legs to prevent the vest from slipping over the head if jumping into the water vertically or simply floating in the water. This strap is protected with neoprene to avoid chafing between the legs. It also includes extra protection in the armpit area to prevent chafing on the sensitive skin of children. This vest has 8 compartments, each containing 3 buoyancy elements, totaling 24. These elements can be gradually removed to help the child improve their ability to float without assistance. Other vests only have 8 pieces, so the buoyancy changes more abruptly when removing the pieces one by one. Sizes Small: From 1 to 3 years, weight 9 to 19 kilos, chest circumference 51-56cm Medium: From 3 to 6 years, weight 18 to 30 kg, chest circumference 56-61cm