Rubber&';s tough, but you can&';t beat felt when it comes to killer grip on slick rocks. Accordingly, you can count on the Simms Headwaters Men&';s Felt Boot to keep you upright when rocks are rolling underfoot and algae is growing all over. This super-grippy boot features a rugged and easy-to-clean nylon and rubber upper, a partial neoprene lining to help your feet stay warm and comfortable, and a dual-density EVA midsole for all-day support. Simms also hooked the boot up with a full-coverage retention plate that provides some support and makes it easy to attach studs, and built the boot on its Headwaters platform for increased stability and comfort when you&';re spending more time in the water than on dry land.