Best Shoe Inserts for Heels & Flats — versatile high heels

1 Buy mules in the right size.    2  Look for mules that are designed properly for the function of walking.   3. The shoe design and style of the mules should support their function.  4.   Know your foot type for best fitting mules.  5. Mules that have high heels should be outfitted with two part foam PORON inserts specifically made for high heels to keep mules stabilized, keep the heel of the foot from slipping sideways off the heel of the shoe, and shift the wearers' weight off the ball of the foot. Low heeled mules or slides should have...