Zig-Zag Track Systems – Our zig-zag track systems have been designed to appear relatively flat when fully closed, similar to a standard woven wood shade. When opened, it stacks with uniform folds resembling a drapery.  Perfect for Patio sliding doors, the shade can stack in the same direction as the door. The headrail can be inserted with the selected fabric to co-ordinate the whole look of the room.