NOTE for manufacturer. Even with loosening the side strap, it is a bit of a bear to get back strap over my heel. These felt insoles are machine washable: Pretty flower print. I was concerned that they would not fit because the description did not state if they fit the X1 but they fit my car fine. The soles are nice and sturdy, fine to wear outside in wet grass after rain. They are also capable of getting loud. Longevity is also not on the menu. Almost been in use for one month and I love it! ) Dear headphone makers: Velour cushions are disgusting and end up full of hair, skin flakes and skin oil and secreted acids.