Safety Guarantee - The Wonder Maxi half balance ball trainer is a creative and new version of balance ball trainer which features in its upgraded cloud textured matte surface, and made of environmental-friendly and non-toxic PVC without any worry of possible allergy. It is harmless to your health, durable and convenient to clean. Slip Resistance & Anti-Burst - The exercise ball base is equipped with 6 anti-slip rubber feet, extra 1.2in thick base and anti-skid cloud texture, which can improve users' stability to a maximum extent, allows you to safely stand, jump, kneel, or lay on this balance trainer, achieving a completely worry free workout. Furthermore, the tested and verified anti-burst technology guarantees a security. Versatile Workout trainer - You can do push-ups, squats, crunches, climbers, lunges, planks and many more workouts with this half ball and exercise bands, which provides endless exercising options & allows a wide range of users to increase core strength, stability and flexibility and making the best of your home fitness routine.