GUC with plenty of life left! Bog winter boots! 100% Waterproof Constructed with 7mm Neo-Tech waterproof insulation DuraFresh natural bio-technology activates to fight odors BOGS Max-Wick evaporates sweat to keep feet dry Flexible outsole promotes healthy foot development Heel provides stability and traction. BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats. Easy on handles Comfort rated to -30°F/-34°C Reflective temperature rating mark on heel