[Compatible with:it is just compatible with bose qc ultra headphonesNot compatible with other Bose models Easy installation:Our bags come with a plastic removal stick just follow our step-by-step video to complete the process! Original design：Perfect fit for bose ultra headphonelossless sound qualit Product Size:On the basis of the original we thickened the high-density foam more comfortable Vision of the future:We will listen carefully to your voice in order to look forward to work together to improve the product to bring you a better product!]