1、The elasticity of band depends on the raw material of latex, and filaments of latex yarn. More filaments, higher density, and better elasticity.                                                                                                                      

2、Loose and tight performance depends on band face weight and weaving specifications.
Some of nylon elastic band looks long in meters, but actually, it is in fast consumption. While some looks not long enough, however, it is consumed slowly. What is the reason? This is something about weaving density, which we call elasticity.
This is the reason why some elastic band looks shorter but in higher price.