Acupressure slippers, spring-loaded the (32) little round springy magnetic massage buttons on the inside depress the twist when you walk, every one of them is marked with the organ, it applys to the heart, kidneys, lungs, pancreas, colon and sundry parts we dont like to list in a family catalogue. comes in three sizes small, medium, Large. 15 minutes walk with this slide does a whole lot in the body repairs. on clearance sales