Crispi Men's Alto Waterproof Gaiters - The Alto Gaiter from Crispi is designed to set new standards in the gaiter industry with its innovative features and superior construction. The Alto is made with a DWR-treated, two-way stretch upper material that is lightweight, waterproof, and highly breathable. Upper: DWR treated, 2-way stretch Lower: 600 Denier Nylon Buckle: Duraflex Closure: Velcro Patented Strapless Boot System: Innovative design that eliminates the need for traditional straps, offering a cleaner and more efficient setup Height: 16.5in (M/L), 17.5in (L/XL) M/L fits boot sizes 7-9.5 and up to 16in calf diameter L/XL Fits boot sizes 10-14 and up to 18in calf diameter Replaceable adjustable strap Style: AL-24