Two of Outdoor Research's lightest and most protective fabrics, hybrid-mapped into a gaiter for reliable defense against pesky rocks, dirt, and debris. ActiveIce™ technology actually cools you as you sweat, while providing UPF 50+ sun protection. Ferrosi fabric wards off wind and rain, and adds durability, stretch, and breathability for when you're moving fast in rugged terrain. The bottom of the gaiter is held securely by a dual attachment hypalon strap, along with a hook/loop attachment for the back of your shoe. You'll receive an extra pair of stick-on loops in the case that your trail runners don't come with that capability built in.