The ear pads play an important role in sound quality.
One is a fitting problem. If there is a gap between the ear pads and the ears, the low -frequency sound pressure changes significantly and has a significant effect on the sound quality. Therefore, it is important to select the material of the ear pads and the sponge inside.
The other is the effect on aging (phenomenon in which the sound of the headphones changes in a way that the headphones are preferably as used). Since the ear pad itself is a member with a large change in aging, it has a major impact on aging. The change in which the ear pad fits into the ears is good, but if it changes too much, it will come off from a preferred sound. 
Based on such viewpoints, listening, and comfort to the ears, we have adopted a material that changes moderately after having the same growth rate on both vertical and horizontally.

Type fiber earpad "Type F" with excellent breathability of D8000 standard products, and Torayu's Ultra Eede® ( * 1) on the surface that touches the skin of the D8000 PRO Edition standard product, more durable. There are three types of ear pads "Type G", and D8000 Pro Limited Edition "Type H", a special fabric earpad using Japanese paper that combines the dry touch and durability.

The above three types of ear pads are compatible with all D8000 products, so for example, the D8000 can be equipped with a "Type H" earpad. The sound quality varies slightly due to individual differences due to different feeling of mounting. Generally, "Type G" may be slightly increased in "Type G" compared to "Type F", or "Type H" may slightly increase the middle and high notes than "Type G", but the shape of the face. It may be the opposite depending on the condition of the skin.
( * 1) Ultra Sade® is a registered trademark of Toray Co., Ltd.