Wedge is a matte brown color very comparable to Naked by Urban Decay, although I'd say Wedge is a little bit darker, but very slightly. I use Naked a lot and sometimes I just don't like to get the whole palette out just for one color, so I though this would be very nice. If you don't own the Naked Palette I really recommend you buy this one.
You can create a lot of neutral looks with this eyeshadow or you can use it in your crease as a blending color. MAC eyeshadows have amazing quality, and this one is no exception as you can see in the swatch below: