· 100% WaterproofBLOOM eco-friendly, algae-based EVAfootbed that helps clean polluted waterhabitats.Constructed with 3MM Neo-Techwaterproof insulationRebound cushioning provides all-daycomfort and energy returnDuraFresh natural bio-technology activatesto fight odorsSteel shank in outsole for stability andsupportSlip resistant outsole for slick wintersurfaces· Zipper on lateral side for easy entry· Comfort rated to -40°F/-40°C