If you're looking for an ultra-lightweight cragging harness, look no further. The Addax comes in at an unbelievable 150g (in size medium), almost 3x lighter than a standard climbing harness and a tiny pack size.
Blue Ice have managed to trim so much weight off, yet incredibly seem to have made no compromises elsewhere; the harness is both really comfortable and has four real gear loops (not a given in lightweight harness) which are large, solid and easy to clip your gear too.
If you're looking for something more at ease mountaineering, check out the Blue Ice Choucas Pro.