Breaking in new tall boots doesn't have to hurt. Heel lifts make the process more comfortable by alleviating pain in the back of the knee and preventing heel and ankle blisters as your boots drop and break in. Resilient rubber layers maintain their lift while absorbing shock at the heel strike. Fully adjustable, our heel lifts add 3/8" at full height, or you can simply peel away layers to create 1/4" or 1/8" as your boots drop or your needs change. Material can be trimmed to accommodate different shoe styles and sizes.