Three layer construction results in only three sizes because the layers are removable</br>Unsurpassed patient comfort</br>Excellent durability</br>Non slip construction</br>Applicability to several clinical conditions</br></br>Product Description</br></br>The Adjust-A-Lift Heel Lift is made with three layers of extra firm, open cell foam rubber, each 1/8 inch thick, held together with double-sided adhesiveA top covering of suede leather completes the lift.</br><br/>http://www.amazon.com/gp/product/B0092PJGZO