GripGrab Flandrien Waterproof Road Shoe CoversThe GripGrab Flandrien Waterproof Knitted Road Shoe Covers were inspired by the classic 'Belgian Bootie' used by Flandrien riders for decades. These shoe covers are only suitable for road cycling shoes. Although they may fit over your gravel or MTB shoes, the tread pattern and enhanced studs on the soles of non road shoes will likely and quickly cause fabric damage, regardless of whether you walk around in them or not, and void the product's warranty.