The base of the insole supports the rear foot and provides structure and stability to the foam layer. The beveled foam edge improved the fit in tighter fitting footwear. Perforations under the mid-foot and forefoot reduce weight and improve breathability. The thinnest Superfeet insole for arch support. Lightweight and durable closed-cell foam delivers long lasting comfort for tight-fitting footwear. All natural coating eliminates odor-causing bacteria for fresh feet. View all our plantar fasciitis products here.