The Perfect Fit heel liner series, available in both thick and extra thick variants, are designed to help alleviate the discomfort and skin irritation caused by unwanted foot movement when walking in loose footwear. Its unique, 5.5-millimeter-thick padded design helps cradle your heel in place for a snug and well-cushioned walking experience. Perfect Fit Loose Shoes is suited for customizing new heels that were a tad oversized or simply an old pair of flats that have stretched.