Fit & Design: Acrylic and polyamide felt fibers form upper for nubuck-like, tear-resistant finish Felt lined straps with adjustable buckles for ultimate comfort and fit Care instructions: Wipe clean with mild soap and water In-Shoe Comfort: Birkenstock® footbed offers arch support, a deep heel cup, and a roomy toe box Sizing tip: The fit of this style is a medium width but may be listed by Birkenstock® as narrow Durability & Traction: Flexible, lightweight, durable and shock absorbing EVA outsole Birkenstock Women's Arizona Birkibuc Sandals