"Special design: Due to its semi-circular design, both sides can be used (flat and pebble side), it is more comfortable to carry and is small and compact, perfect for gym, yoga, Pilates studios or office.Durable materials and firm structure: diameter 16 cm, the children balance stepping stones made of a high-end material PVC, whose properties include tenderness, flexibility, comfort and safety.Multifunctional: no assembly required and easy to use. When you come home, you need to be tired after working all day. Put your feet on the massage ball. Various functions, including relieving muscle pain, promoting blood circulation, relieving nervous tension, etc.Multiple exercises: suitable for multiple exercises, such as home fitness, stretching, strength training, physical therapy, natural latex bands, training, Pilates, yoga, gliding, etc. These yoga massage balls help you train the firm abs, V-line abs and other ideal figure.Effective massage tool: This set of two inflatable balance pods as a self-massage tool, it can be used on different body parts such as neck, back, waist, sole, etc."