Goatskin is often referred to as nature's strongest leather. It has very high tensile-strength and abrasion-resistant properties, but has softness and is lightweight. Because of this high strength-to-weight ratio, the Endura® goatskin all-leather drivers are much tougher and more durable than their suppleness leads to think. Keystone thumb for extra durability. For handling building materials, assembly work, farming, municipal work, utilities and metal fabrication.