The Bogs Crandall Tall Speckle features lots of comfort-inducing technology packed into a very unassuming boot.This boot is 100% waterproof and is insulated to keep you comfortable down to -40F. Inside, the Rebound insole provides all-day comfort and energy return. It is constructed with 3mm Neo-Tech waterproof insulation and the Bogs BioGrip slip-resistant outsole. The DuraFresh natural bio-technology activates to fight odors and the Bogs Max-Wick evaporates sweat to keep feet dry. The steel outsole shank gives stability and support.