Rocky Nail Guard Puncture-Resistant Waterproof Work Boots have unmatched work site protection. Nail Guard meets ASTM standards for puncture resistance, protecting you against nails, metal and other sharp objects found on the job, giving you the confidence to focus on the work at hand. While this safety feature is great in a men's work boot, Rocky wants to give you more. With the addition of Rocky Waterproof Construction, your feet stay dry. Guaranteed. Walk confidently through mud puddles, work in the rain; these work boots have you covered.