Absorbs Shock In the Heel & Cushions the Sensitive Ball of Foot Area. The 4/5 Length Design Fits Perfectly In Your Shoes while Allowing Room for Your Toes. Extra Support In the Arch. Ideal for Open & Closed Toe Footwear to Include: Dress, Casual, Heels, Boots & Sling Backs. Fits Women s 5-11 Invisigel provides your feet with extraordinary cushioning and superior all day comfort in a super slim design.