Icebug's best-selling winter boot. Metro2 BUGrip is a comfortable studded winter boot that you can walk in during winter without the risk of slipping. The upper is made of water-repellent suede, and the zipper on the inside of the foot makes the boot easy to slip on. Woolpower brand wool lining. The 16 dynamic carbide steel studs allow you to walk many miles on asphalt without worrying about wearing out the boots! Please refer to the size chart.