About this item COMPATIBILITY: Fit perfectly on QuietComfort 3 (QC3) and OE1 Headphones. FLAWLESS INSTALLATION: A detailed user guide is included, making the entire installation easy and fast (usually 3 mins). PREMIUM MATERIAL: Adopt the high-density memory foam and the super-soft protein leather, ensuring excellent bass and enhanced noise isolation. TIME TO CHANGE YOUR OLD ONES: Revitalize your headphones with new cushions, making them look brand new again. Dimensions: 5.67 x 3.7 x 0.67 inches.