Blundstone 584 Winter Rustic Brown, waterproof winter comfort with fleece and Thinsulate?. Waterproof elastics, too. Unisex Blundstone sizing.Premium waterproof leather Fully waterproof boot with waterproof elastic and latexed seams Lined with 200 grams of Thinsulate insulation Thermo-urethane outsole resistant to hydrolysis and microbial attack Polyurethane midsole for comfort- PORON� XRD� in the heel strike zone to dissipate heel strike shock