1. Place two long brackets on the top of the adapter into the upper side of the frame;
2. thumb in the middle of the frame, push up, so that the adapter completely into the inside of the frame;
3. At this point the adapter will be placed two short bracket should be stuck in the snow inside the lower side.
4. Adapter with curvature, so in the near vision lens, the degree should be reduced by 25-50 degrees
Note: Please check your goggles size before you place order.