The KJ-XR3 model is our standard model with our Patented Impact Protection System, durable plastic shells, and non slip soles. This model is intended for users under the weight of 200lbs. The revolutionary concept of Kangoo Jumps shoes allows total freedom of movement. Easily transportable, they are usually referred to as a gym in a bag, as they satisfy all requirements for a full body workout making training fun and enjoyable. This versatile high-quality Swiss designed product is easy to use for anybody, any age from 6 to 92 years-old, anywhere, anytime and for any fitness level