Gender: Mens/Unisex Color: Black Size: 7 Market Color: Black Primary Color: Black The Canadian from the Reaction Series is built based on our five layer inner boot technology which guarantee this boot is rated to a. temperature of -40C/-40F. We have improved the outer shell made from light-weight synthetic recyclable rubber. We added a flexible ultralight midsole and integrated the premium rubber compound outsole to superior arch support system for more comfort.