Features: Jump shoes fitness boots are a new and incredible high-intensity interval fitness program! This is not surprising: after all, jump shoes are not only fun, but also very effective for weight loss and overall tension. Develop muscle stabilizers, strengthen deep muscles in the back and body, form beautiful postures, and improve coordination; Improve the function of the lymphatic and cardiovascular systems, eliminate excreta and adipose tissue; Improve emotions and reduce stress. Relieve the shock and vibration with A shock-Absorbing Device(Flexible Spring) Easy to use with shoes on suitable for your weight and the lenght of foot More calories and better fitness can burn by this way, it's easy to burn calories, build fitness, coordination and strengthen leg muscles. Size Information: 33/35 M for 30kg-50kg body weight(66lbs-110lbs); Foot length:21.5cm-22.5cm 36/38 L for 50kg-70kg body weight(110lbs-154lbs); Foot length:23cm-24cm 39/41 XL for 70kg-90kg body weight(154lbs-198lbs); Foot length:24.5cm-25.5cm 42/44 XXL for 90kg-110kg body weight(198lbs-243lbs); Foot length:26cm-27cm Mesh+Pu Synthetic Leather Shell: TPU Spring: TPE Color: Pink Black Notes: 1. Due to the different display and lighting effects, the actual color of the product may be slightly different from the color shown in the picture. 2. Due to manual measurement, please allow a measurement deviation of 1-3cm.