The Keen Men’s UNEEK Sandal in Black/Black is designed for a secure, adaptive fit with a contoured shape that follows the natural curves of your foot. Built with a recycled plastic bungee cord upper and lace-lock toggle for easy adjustment, it features supportive midsole cushioning for shock absorption and a razor-siped rubber outsole that channels water away for reliable grip on wet surfaces. Finished with a soft microfiber lining, eco-friendly anti-odor treatment, and recycled P.E.T. materials to reduce environmental impact, it combines comfort, traction, and sustainability in a lightweight, non-marking design.