* These Unique Sleeves Are Lined With Visco-gel That Releases Vitamin E Enriched Mineral Oil Onto The Skin Surface To Help Soften And Moisturize Rough Dry Cracked Heels * Improvement Is Noticeable After Just A Few Hours * Typically Worn While Resting Or Overnight * Apply Moisturizing Creams To Heels Before Use For Even Faster Results