The easiest way we can identify by smell. Those using high-quality raw materials have no peculiar smell, while those using inferior toxic raw materials will have a pungent plastic smell. Do not buy them. In addition, whether it has passed the GS certification tested by TUV can also indicate whether its materials are harmful to the human body.
There are currently two types of exercise balls on the market, explosion-proof and pearlescent. The explosion-proof ball is made of high-grade explosion-proof material, which feels soft like a sponge, and at the same time has the pressure resistance and flexibility like a tire and the high elasticity like a spring. Generally, it can bear a weight of about 400 catties, which is safe and secure. The surface of the best yoga ball made of pearlescent material is very smooth and has good reflective properties, but in terms of craftsmanship, only some pearlescent powder is added inside, and the thickness is a little thinner than that of the explosion-proof material.