About this item COMPATIBLE: These ear pad sweater covers are compatible with Studio 3 / 2 Wireless / Wired QuietComfort 15, QuietComfort 25, QuietComfort 35, and other ATH, AKG, SONY, Sennheiser headsets with 3 - 4 inches ear cushions. (Note: DO NOT compatible with Solo and other headphones with 1.57-2.91 inch ear pads.) EASY INSTALLATION: No tools needed, easy to install and use. PROTECTION: Protect your headphone ear pads from scratches, dirt, and sweat, greatly improving the earpads' durability. HIGH QUALITY MATERIAL: Made of durable, stretchable knit fabric, the ear pad protectors have a comfortable touch and can be hand washed. Dimensions: 6.26 x 3.11 x 0.39 inches.