Description:Children's double layer back protector: suitable for outdoor extreme sports such as cycling, roller skating, equestrian, skiing, etc.Ergonomic: The 2.5mm/0.10inchPE shell is designed to fit the back of the human body, which can play a good role in protecting the spine and waist.Product features: There are double layer protective pads under the PE shell, which can be disassembled freely. Mesh outside, terry inside Scientifically designed 5mm vents are designed to protect you while allowing .Adjustable: You can adjust the length of the belt and buckle arbitrarily until you feel comfortable.PERFECT GIFT: The perfect gift for kids who love outdoor sports.Specification:Material: PESize Chart:Applicable height:S: 90cm-110cm/35.43-43.31inchM: 110cm-130cm/43.31-51.18inchL: 130cm-150cm/51.18-59.06inchPackage Includes:1 Back ProtectorNote:Please allow slightly errors due to manual measurement and different monitors.