The Sof Sole® Airr® Insole has an encapsulated air chamber in the heel and arch, as well as Polymer Gel in the forefoot for ultimate shock absorption. Featuring a COOLMAX moisture wicking top-cover, the Airr is designed to create an ideal environment for your foot.Features: Microban® helps prevent the growth of odour-causing bacteria COOLMAX® fabric top cover wicks away moisture SKYDEX® air capsules in heel and arch convert impact into kinetic energy New slimmer design to fit into all athletic shoes Polyurethane foot bed for full-foot comfort Gel forefoot enhances shock absorption The neutral contour design is suitable for any user or type of footwearGlossary:Microban:A technology that helps reduce the build-up of odour-causing bacteria.Coolmax:A fibre that wicks moisture to help keep feet cool and dry.