This boot has a classic look that is also comfortable. It features 4mm neoprene with breathable PK mesh lining to keep your feet cool on warmer days. The lightweight, shock-absorbing footbed uses a dual density EVA insole with gel cushion insert for ultimate comfort. 100% Waterproof. Fully lined with 4mm neoprene for comfort. Breathable PK mesh lining. Lightweight EVA insole with gel cushion insert for comfort. Pull-tab for easy on and off.