The weight toning ball (often called medicine ball) is utilized in performing pilates, fitness, strength, yoga, and in rehabilitation. More flexible product replaces any big heavy old-day weight. Most comfortable design for anyone: This medicine ball is designed with a proportion of fitting your one hand palm: conveniently small, easy to grab, made of durable soft PVC shell, filled with natural Sand creates instability to activate different muscles of your workouts. Be a brilliant alternative to dumbbells to improve self-balance, strength, and flexibility. NOTE: You can completely leave the toning ball on wooden floors/tables but make sure that your floors/tables do not get any wetness. Please keep the product in a dry place, away from direct sunlight.