Genuine Leather. Lining: leather Insole: Anti-fatigue Sole: Polyurethane high density, non marking Non-slip Hight: 6" The HM345 MOC TOE 6" GRASSO TAN WORK BOOT is made with genuine leather, providing durability and lasting quality. Its leather lining and anti-fatigue insole offer comfort and support for long hours on the job. With a polyurethane high density, non-marking and non-slip sole, these boots provide safety and stability on various surfaces. At 6 inches high, these work boots offer the perfect balance of protection and flexibility for all your work needs.