The legendary duck boot moc is warmer than ever, with a super-soft sherpa fleece and lightweight PrimaLoft insulation for cozy warmth even when wet. Premium full-grain leather upper. Sherpa fleece lining adds lightweight warmth and super-soft comfort. Convenient slip-on style with rawhide lace to adjust fit. Laces not waterproof. Footbed is lined with 200 grams of PrimaLoft® insulation for reliable warmth in wet weather. Iconic triple-needle stitching provides long-lasting durability. Waterproof rubber boot bottom keeps feet dry. Uniquely shaped foot form offers comfort and stability, and a steel shank adds support. Legendary chain-tread outsole gives reliable traction.