Bundle
Knee braces that have a large hole in the front to expose the knee are usually strapped and fastened with Velcro. This type of knee brace can be tied tightly so that the knee cannot be easily bent and the thighs and calves are always in a straight line with the knee.
Sleeve type
With a certain degree of elasticity, the knee can still move freely after wearing it, but you can obviously feel the patella being gently tightened a little, this kind of light braking knee brace can be used for the protection of the knee in ordinary sports.