Georgia Boot - 6" Mud Dog (Georgia Brown) - Men's: Work in comfort and confidence in these great boots. SPR(tm) leather shaft. High abrasion and moisture wicking mesh lining. Molded waterproof TPU shell and full gusset leather tongue helps keep feet dry. Removable polyurethane Comfort Core(R) air flow orthotic insert helps keep you comfortable all day. Steel shank for maximum support and stability. Durable "weave" rubber outsole for superior traction.