Headset Ear Cups, TOOPOOT Replacement Ear Cushion Pads for Bose QuietComfort QC15 QC2 AE2 Headphones Replacement Ear Pads Cushion for Bose QuietComfort QC15 QC2 AE2 Headphones BW Material: Top quality of Protein leather and Memory foam Compatible for Bose QuietComfort QC15 QC2 AE2 AE2I Headphones As we know, most of the ear pad of headset are made of leather or Velour, which are very difficult to clean, however, if not be cleaned for a long time, the ear pads will be polluted by the secretions of face, it is horrible for a music fan hearing misic with a dirty and full of bacteria headphone, so we highly recommend to replace the ear pads every three to six months.