defean Replacement Gray Fabric HD4.50BT, HD4.50BTNC, HD4.40BT Memory Ear Pads Cushion Compatible with Sennheiser HD 4.50BT, HD 4.50BTNC, HD 4.40BT Bluetooth Headphones (All Fabric)
Sennheiser HD 4.40BT Wireless Bluetooth Headphones Over-ear Hi-Fi Headset Sport Bass Music Gaming Earphones Foldable with Mic
Review: Sennheiser HD 4.40 BT Wireless - Headphonesty
Audio Replacement Cable with in-Line Mic Remote Volume control Compatible with Sennheiser HD4.40, HD 4.40 BT, HD4.50, HD 4.50 BTNC, HD4.30i, HD4.30G Headphone and Compatible with Samsung Galaxy Huawei