"These kangaroo jump shoes made out of high quality materials such as high polymer plastic, tire quality rubber, hydraulic press for weight capacity check. Perfect for dancing, jumping, bouncing, running, jogging short and long distances, workouts and any other type of exercise.PRODUCT CARE:Do not use during temperatures below 8 Degrees Celsius either indoors or outdoors as it may cause damage. Store in room temperature area.Size Chart:3.5 - 6 feet length 22CM - 23.8CM6.5 - 8.5 - feet length 24CM - 26CM9 - 11.5 - feet length 26.7CM - 28.6CM"