Full-Grain Leather Upper To ensure its quality, we put our leather through six different tests before making our selection. Our full-grain leathers are the strongest and most durable form of leather. Danner Dry100% waterproof barrier allows moisture to escape without letting water in, keeping your feet dry and comfortable all day long. Aluminum Toe (AL)Our aluminum toe meets or exceeds ASTM F2413-18 I/75 C/75 EH standards. Electrical Hazard (EH) Protection Electrical hazard (EH) footwear is manufactured with non-conductive electrical shock resistant soles and heels. Danner® Caliper Outsole The oil-and-slip-resistant rubber Caliper Outsole offers versatile indoor and outdoor traction with a low-profile 90° heel. Memory Foam Strobel Sock The strobel sock, the material used to finish the bottom of a boot, is made from memory foam for additional comfort and cushioning underfoot. How It Fits Designed for versatility, the DPDX has a low profile for everyday wear. Whether on the trail or urban exploring, this last was built to offer enough room for comfort while maintaining a sleek profile. Ortholite footbed included. Please note that if you are in-between sizes, we recommend sizing down a half size for best fit.