product description1. The small yoga ball is made of durable non-slip PVC with honeycomb structure design to prevent bursting. The matte surface is grippy enough to feel stable and secure, yet smooth enough to let you move around. You can easily use the exercise ball for any related workout without worrying about falling on the floor.2. MULTIFUNCTIONAL - Small Pilates Balls help enhance your Pilates, barre, core strengthening and yoga practice and improve your abs, upper body and lower back strength and flexibility. The durability and stability of the flex ball allows you to squeeze it between your knees, under your back, and bounce safely across the ground. This yoga ball is a great gift for a lover or friend.3. PORTABLE AND EASY TO STORAGE - If you're on the go a lot but don't want your travels to interfere with your fitness routine, just throw this mini yoga ball into your suitcase.4. The stability ball comes with a straw, make sure to inflate the ball a little more than usual, then quickly cover the hole with your finger when trying to plug it.5. Recommended by Sports Coach - Female/Male Mini Exercise Ball is suitable for physical therapy, especially waist rehabilitation, because proper soft ball exercise can strengthen and develop the core body muscles that support the spine.