Easy DIY installation, no tool needed. Fits over the original headband and zip up in place. Don't need to remove the original headband. Can be used to cover your wear out headband or protect it from scratch, sweat. Also as extra pad to improve the wearing comfort. This headband protector is compatible with SONY MDR-Z600, MDR-V900, MDR-V600, MDR-MV1, MDR-V6, MDR-NC500D, MDR-CD900ST, MDR-7509, MDR-7506, MDR-M1ST, MDR-M1 headphones. Product Dimensions: 8.8 x 4.3 inches (22.5 x 11 cm), Color: Black Package Contents: Headset headband cover x 1