The Mongrel 961050 Wheat Zipsider Boot features Mongrels TPU/PU ToughSider sole technology, producing a durable long lasting sole that’s light and comfortable. This is paired with Mongrels new comfort breakthrough, the Orthotech Innersole that features the AirZone system, providing long lasting comfort while allowing air to circulate around your feet. The practical ZipSider design gives the support you need from a lace up boot and the convenience of an easy on, easy off boot. Fully lined and with a padded tongue and collar, you can be assured all day comfort in the Mongrel ZipSider boot. Item Specifics: TPU/PU ToughSider sole ZipSider style AirZone comfort system OrthoTec PU innersole Fully lined Padded tongue and collar Mongrel 961050 ZipSider Boot Wheat