What is the Heel Grip for?
The Heel Grip primarily reduces the space at the heel providing more grip for the heel in a wide range of shoes and uses suede for grip and flexibility
The Heel Grip functions around providing additional grip to the heel lessening slippage, providing additional protection through this function even though you may be already wearing socks.
Why Suede?
Suede is comfort and to prevent blisters when rubbed against.