Underquilt Hooks are designed to keep your underquilt in place while you sleep . These help to prevent you from waking up in the middle of the night cold because your underquilt has moved. We use 8 hooks 4 at the head , two on each side, and 4 at the foot ,two on each side. The underquilt hooks we use are ordered from hammockgear.com. We have found that the hooks ordered from them have a slightly wider opening than hooks from other places. The wider opening makes it easier to clip onto the quilt but still does an excellent job holding it in place.