Full grain SPR leather. Durango X-Pand System. Durango waterproof membrane bootie construction. Soft mesh lining. Durango X-treme Comfort Footbed. Fiberglass Dually Shank System for torsion stability and midfood support. Puncture resistant insole. Multi Durometer rubber outsole with high abrasion rubber outsole lugs for high impact durability and softwer durometer mid lugs for added flexibility and increased slip and oil resistance. All around genuine Goodyear welt construction. Genuine leather welt with .75" double row cotton stitch. Durable ABS heel. 1.5" Rocker heel. Square toe.