In reply to Andy Johnson:
It's a similar style to the BD bod harness, basically you pass the waist around yourself pull the belay loop between your legs and pass the tail of the waist through the belay look and then pass it through the buckle. If you've never seen one it's a bit bizarre more used in alpine climbing and ski touring than "proper" climbing pros are you can put them on with skis or crampons on or just without lifting your feet through leg loops.