The secret of bi-component sound-absorbing cotton lies in its structure-much like a carefully assembled sandwich:
Rigid layer: Typically high-density polyurethane, responsible for blocking low-frequency noise (such as the muffled thud of a fist hitting a punching bag).
Soft layer: Open-cell fibrous cotton that absorbs mid- to high-frequency noise (akin to a sponge absorbing the sound of dripping water).
Composite effect: When the two layers work in tandem, noise reduction performance improves by approximately 40% compared to a single-layer material.