1. Our insoles protect and support your heels from slipping, rubbing, and blisters, and help keep your heels in your shoes, recommended for shoes larger than half a size or larger. 2. Soft, ergonomic design replicates the contours of your heel, cushioning them to prevent slipping, rubbing, blisters, and heel pain. 3. Our heel cushions are made of breathable foam material to keep your feet cool and dry, and the super sticky backing is made of double-sided tape to prevent slipping. 4. These heel pads are unisex and suitable for all types of shoes, such as boots, running shoes, tennis shoes, sneakers and leather shoes, etc. 5. Just peel off the double-sided tape, you can easily stick it on the inside of the heel and fit it according to the curvature of the heel, without worrying about rubbing your foot or the heel falling off.