1These Matecastle ear pads are specifically designed for the headphone models belowthe concave scrims dont fit other headphone modelsBose QuietComfort 45 (QC45) Black HeadphoneBose QuietComfort 35 (QC35) Black HeadphoneBose QuietComfort 25 (QC25) Black HeadphoneBose QuietComfort 15 (QC15) Black HeadphoneBose QuietComfort 2 (QC2) Black Headphone2What Makes Matecastle Ear Pads Different?1)Softer and smoother protein leatherhigh-density memory foam enhance comfort the ear pads.2)Stronger protein leather increase the lifespan of the ear pads.3)Big enough ear hole offers an enhanced level of comfort for your ears.4)Thicker memory foam and thicker sealing ring optimize your headphones noise-cancelling acoustics.5)Impeccable craftsmanship makes you satisfied with the purchase from us.