Lytech upper is a stylish and comfortable blend of Lycra and polyurethane; Water resistant and breathable; Twin Arch Support System - The twin-arch support technology of the sole provides all-day support and keeps your feet comfortable and happy; Removable textile insole provides all-day cushioned comfort and lets you add a personal orthotic; Durable polyurethane outer sole absorbs impact and provides grip for a confident stride; Vegan - 100% free of animal products; Sustainable materials; Eco-friendly; Machine washable; Made in Portugal