Tuli's double-ribbed classic heel cups provide 50% more protection than the previous model and provide relief from the everyday pain of heel strike. 
Tuli's Gel Classic Heel Cups are made with TuliGel.  TuliGel is a new, 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.