Balance Ball Balance Trainer 660LB Weight Capacity, 23" Half Ball with Resistant Band, Anti Burst Design, Anti-Slip Surface for Home Gym Yoga Fitness Stability Workout with Foot Pump

Constructed of environmentally friendly, non-toxic PVC, which is hypoallergenic, durable and easy to clean;   The surface corrugation is designed to enhanced grip with your hands or feet on the dome, meaning you won't be sliding off during a workout anytime soon;