The convex design can better fit the forefoot and make the forefoot force evenly. The bottom groove design is not easy to slide when the friction is increased. The bump design plays a massage role to relieve the fatigue of the foot.

Half Insoles for Shoes Inserts Forefoot Insert Non-slip Sole Cushion Reduce Shoe Size Filler High Heels Pain Relief Shoe Pads. The convex design can better fit the forefoot and make the forefoot force evenly.