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 Durable, hand-lasted rubber over a four-way stretch inner bootie Self-cleaning outsole BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats Comfort rated to -40°F/-40°C These have been in the box for a couple of years - I usually wear a size 9 mens or a 10/10.5 womens, but these were a little snug on me. They are unused, but I did test them for water tightness and they are good