Bare bones, disappointed.
Package arrived with the glasses in the little baggie. No hard case and no 2nd pair of lenses with which to "interchange." I have purchased 4 pairs of interchangeable glasses in the past two years from REI, Smith and Tifosi brand names. This is the first time I've encountered interchangeable lenses sold separately. Removal process on other glasses is also superior.
I have a medium to small face and these definitely squeeze. Backcountry just gave me the final reason to stop impulse buying from Steep n cheap. Emphasis on cheap.