LaCrosse Zxt Guardsmen Completely waterproof and slip resistant on land and marine environments, the ZXT Guardsman boots are made from proven rubber formula. OZONE & TEAR RESISTANT RUBBER Built with more natural rubber than most other boots, the hand-laid rubber remains durable and waterproof year after year. ZXT rubber is specially formulated to be ozone and tear resistant for added protection. ADJUSTABLE TOP STRAP Customizable for a secure fit around your calf. NWOT Unisex Men’s 6/Women’s 7.5-8