Barretex-Plush fabric Top cover cools foot and helps reduce friction Pedura-HD foam for added comfort and cushioning Plasti-Flex shell supports and stabilizes arch area, holds foot in natural alignment. Cushioning foam bottom layer for continuous comfort. Barretex-Plush fabric Top cover cools foot and helps reduce friction Redi-Thotics FLEX offers orthotic support for tired, sore arches and feet. The Plastiflex shell will support and cradle the arch while our Pedura-HD foam layer will give comfort and cushioning to reduce The Barrettex top cover wicks moisture away while maintaining a soft upper for extra comfort and dryness.