The Pittsburgh is more than just footwear, it's a tool to get the job done right.This brand is a member of the Sustainable Apparel Coalition.Waterproof nubuck leather upper.Locking metal hook and lacing eyelets.Keen.Dry waterproof breathable membrane locks out rain and humidity, but releases the heat and perspiration created throughout a hard day's work.Removable metatomical dual-density EVA footbed.Keen Key-Tech full-length TPU interlocking torsion plate.Dual-density, compression-molded EVA and PU midsole.EVA heel cushioning insert.Contoured heel lock.Dry-Lex footwear lining with hydrophobic/hydrophilic 2-zone comfort technology.Reflective webbing for additional safety.Keen.Key-Tech is a full-length TPU stability plate that provides forefoot flexibility and underfoot stability to meet the demands of the workplace environment.Oil and slip-resistant non-marking rubber outsole.Unique anatomically-correct steel-toe design provides a roomier toe box and maximum comfort. ASTM F2412-05 and F2413-05 I/75 and C/75 standards.Meets or exceeds ASTM F2413-11 EH standards for electrical hazard protection from open circuits.