Amazon.com: Justin Joist 11。The Joist Waterproof Composite Toe 11\" tall Men\'s Hybred® work boot is built for durability. The leather exterior is waterproof and accented by a simple stitch pattern along the upper. This boot features layers of comfort with a J-Flex Flexible Comfort System® insole, the Justin Stabilization Technology, Ortholite Comfort Foam insole, and a Dri-Lex® cover. The composite toe provides security and comfort and meets safety standards without weighing you down. Its multi-density rubber and EVA combination outsole offers lightweight durability and meets the standards for electrical hazard footwear so you are guaranteed protection against open circuits of up to 18,000 volts. This boot also provides an Achilles Relief System® that eliminates weak spots in foot comfort by using stretchable material, high-density foam, and moisture-wicking anti-microbial lining to provide flexibility, support and breathability. Details Upper: Premium Full Grain Leather Lining: Woven Insole: Ortholite Removable Insert Toe Shape: Square Construction: Cement Outsole: Rubber Safety Features: EH, Waterproof, Composite Toe, Oil and Slip Resisting, ASTM F2413 rated