Tuli's patented, multi-cell, multi-layer waffle design absorbs shock and returns impact energy just like the system naturally found in your feet.  The heel cups provide immediate heel pain relief by cushioning the area of pain and elevating the heel bone. 
Tuli's Gel Classic Heel Cups are made with TuliGEL.  TuliGEL is a specially formulated polymer that is lighter, softer and more resilient than the material used in other heel cups.  The unique character of TuliGEL, combined with Tuli's patented waffle design, provides the ultimate in shock absorption.