Colour: Charcoal The Smart Folio for iPad Air (M4) supports a wider range of viewing angles for reading, watching movies, typing, or making FaceTime calls. It automatically wakes your iPad Air when opened and puts it to sleep when closed. Thin and light, it protects the front and back of iPad Air. Colour: Sage The Smart Folio for iPad Air (M3) supports a wider range of viewing angles for reading, watching movies, typing, or making FaceTime calls. It automatically wakes your iPad Air when opened and puts it to sleep when closed. Thin and light, it protects the front and back of iPad Air.