【Specially Designed Bumps for Upgraded Grip】The Trideer Exercise Ball is particularly designed for fitness enthusiasts like you! The aesthetically pleasing bumps and lines increase grip on the floor and the body to help you stay amazingly stable and safe in any posture or movement you do.【Incredibly Versatile for Home Workout】 This Trideer Exercise Ball is all you need for the fitness of your entire family! Use it to tone your abs during your home gym workouts, and improve balance in your yoga practice. The bumps work wonders to awaken the sensory system of children with sensory integration challenges. Also, enjoy better circulation and less back pain as you sit on it as a home office chair!【Revolutionary Honeycomb Structure for Safety】The Trideer Exercise Ball boasts of fabulous resilience and a high weight capacity of 330lbs. It can easily withstand high impact exercises. The honeycomb structure produced using the top-notch foaming technology allows the ball to deflate slowly enough to ensure the safety of you and your family during use when it is accidentally punctured by pointy objects.【Pump Included for Easy Inflation】 A Pump comes with the exercise ball to make your life much easier when it comes to inflating the ball! Hand Pump for the 55cm/65cm ball; and Foot Pump for the 75cm ball. The gorgeous package makes it a beautiful and unforgettable gift on Mother’s Day, birthdays or anniversaries to show your care and love to your beloved one.【Risk-Free Purchase & Lifetime Customer Service】Please do not hesitate to contact us if you have any question or issue. If you are not satisfied with your purchase of the Trideer Exercise Ball, we will provide a full refund or replacement for free, with a smile and a warm thank you! We will go out of our way to take care of your problem within 24 hours. Product Description 1 Tone Butt & Legs 2 Strengthen Core 3 Activate Back 4 Legs Obliques Why are these exercise balls more suitable for gym workouts? The bumps and lines on the surface of the exercise ball offer increased friction on the body and more grip on the floor, thus keeping your moves safer and more stable. How do I choose the right size for me? Here’s how to choose the right size: go for M if your height is between 4'5''-5'1'', L for height between 5'1''-5'9'', XL for height between 5'9''-6'3''. If you are between sizes, please size up. Do these exercise balls come with pumps? Yes, they do. Size M (55cm) and L (65 cm) exercise balls come with hand pumps, and Size XL (75cm) balls come with foot pumps. What are included in the exercise ball package? One exercise ball, 1 pump, 1 measuring tape, 2 plugs, and 1 plug remover. What does it mean that the exercise ball is ANTI-BURST ''Anti burst'' means when the exercise ball is punctured by any sharp object about the size of 1*4mm while bearing any weight up to 330 lbs, it deflates quite slowly instead of popping suddenly so as to prevent injuries while use. How to Choose the Right Exercise Ball ? Color Gray Blue Rosy Morning Glow Green Black Size 22/26/30ines 22/26ine 22/26/30ines 18/22/26ine 26/30ines Weight Capacity 330lbs 330lbs 330lbs 330lbs 330lbs Uses Fitness Fitness Yoga/Preganncy Physical Therapy Office Ball Chair Noni-Slip Anti-Burst