Completely waterproof and non-metallic, the Rockport Works Post Walk Postal Work Boot WP is designed for postal workers. These boots are U.S. Postal Service certified and built on a polyurethane cushion insert with shock diffusion gel to provide total comfort throughout your shift. Hydro-shield seam sealed construction keeps water out, perfect for working in the rain or snow. The SmartLite Thermoplastic polyurethane outsole is oil and slip resistant to provide stability and keep you moving even on slick surfaces, while a moisture-wicking lining maintains a cool, dry environment for your feet. Rain or shine, these boots will deliver all-day comfort.