· 100% Waterproof · Rebound cushioning provides all-day comfort and energy return · Made with seamless construction - 30% lighter and more durable · Constructed with 5mm Neo-Tech waterproof insulation · DuraFresh natural bio-technology activates to fight odors · BioGrip slip-resistant outsole · BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats. · Reflective temperature rating mark on heel · Comfort rated to -35°F/-37°C