DuPont Tyvek 400 TY454S 18-Inch High Boot Cover with Tyvek FC Skid-Resistant Sole and Elastic Top, White, Large (Pack of 100) 18-inch high boot cover Elastic top provides coverage up to calf Sole material composed of Tyvek FC to provide added slip-resistance Composed of flash spun high density polyethylene An ideal balance of protection and durability