High-performance midsole with ETPU for superior rebound Solid Gear's most popular sole is now available with a lightweight full EPTU midsole. It is ideal for users who prioritize superior comfort and stability. It is now possible to take advantage of the highest EPTU performance that lasts for a long time. The Vibram rubber outsole is still very durable and has good anti-slip properties. The torsional stiffness of the shoe comes from the dual TPU elements and enhances ergonomics. The durable microfiber upper with GORE-TEX membrane provides waterproofing while maintaining good breathability. A newly designed, customized ergonomic tongue with GORE-TEX Stretch technology in the upper, along with a high heel counter and BOA Fit system, makes this shoe truly unique in its fit to the wearer. Upper: CORDURA stretch Membrane: GORE-TEX Outsole: oil-resistant and slip-resistant Vibram rubber Midsole: ETPU Insole: breathable EVA with poron inserts Feature: BOA fit system Fit: Wide Sizes: 36-48 Safety standard: EN ISO 20345:25XL S3, SRC, HRO, WR Protection: fiberglass insole and soft toe protection