Explosion-proof: The material is made by 14 processes, 3 times of raw material foaming, 5 times of filtering, 6 times of proportioning process, car tire explosion-proof material, cut honeycomb mesh environmental protection PVC, 0.14 mm thickening, prolong the service life Double safety. Safe load-bearing 150 kg, explosion-proof material of car tires, safe and no smellImprove balance: strength and fitness, use yoga balls to activate muscles throughout the body. By training with flexible exercise balls, you can stretch your body, improve balance and reduce the soreness caused by prolonged sitting. It is also suitable for supporting the waist and abdomen during pregnancy to reduce the discomfort of pregnant women.?Giveaway: Air pump, air pull, air stopper, make you more convenient to use. During use, the ball is inflated to about 80%, making the ball softer and safer. When not using Swiss balls, you can release the gas, fold and store the ball.Specifications: Choose the correct ball according to your height. 85cm is suitable for height over 190cm, 75cm is suitable for 180-190cm, 168-180cm is suitable for 65cm, 55cm is suitable for 150-168cm, 45cm (less than 150cm) . Various colors are available. Choose the one you like and start a healthy life immediately