Dan Post Mens Storm Surge Waterproof Work Boots ASTM 。Product Details This Dan Post Storm Surge Waterproof Composite Toe Leather Boot DP59418 is our Hurricane Series boots are amazing in design, performance, and comfort Full-grain WATERPROOF leather upper, dual-density midsole for flexibility, comfort, and energy return, a breathable open-cell orthotic with Ortholite Waterproof membrane bootie Omni-directional tread design for multi-directional grip Anti-microbial lining Oil, heat, and slip-resistant rubber outsole. The composite toe and electrical hazard rating meet ASTM F2413-18 standards 11\" Shaft Stockman heel Textile lining Embroidered shaft design Rubber outsole ? To help you with the proper care of your new boots, I conditioned them by hand with a high end leather treatment and protector prior to listing. This conditioned and nourished the natural leather; as well as gave it a protective barrier against the elements. I recommend you do the same every 3-6 months. :) ?