COMPATIBLE WITH THE BOSE SERIES: Official ear cushions are compatible with Bose original headphones. Premium replacement ear pads compatible with Bose headphones, suitable for QuietComfort QC35 QC35ll HIGH QUALITY COTTON: Professional replacement ear cushions use high quality cotton and skin-friendly protein leather. Ensuring breathability and a good experience when using. ENHANCED STEREO SOUND QUALITY: Our ear pads are ergonomically shaped to ensure airtightness and practicality, perfectly transmitting sound, ensuring excellent noise isolation and improving stereo feeling. EASY INSTALLATION: Replacing replacement Bose ear cushions is quite simple and no special tools are required. You can check the installation guide on the detail page or contact customer service for installation (3-5 minutes)