Durango Men's Maverick XP 11" Ventilated w/Insulkul Work Boots - Briar Brown/Crimson RedSquare toe ASTM F2413 electrical hazard standard Rolled shank area 1 1 2" Rocker heel Fiberglass shank Double row sole stitch Single row sole stitch Full grain leather with ventilated shaft to promote maximum air flow Dual Density Midsole with firmer shock absorbing heel for added stability and a soft shock absorbing forepart for ultimate flexibility and comfort Anti torsion rigid external shank provides added lateral stability Air mesh lining Saddle