Amazon.com | Reef Fanning Mens Bottle Opener Flip Flop, Arch 。With a synthetic nubuck upper, padded liner, compression molded footbed with a heel airbag, plus herringbone rubber outsole with built-in bottle opener to celebrate success. Vegan Nubuck (Synthetic Microfiber) Use a soft, dry cloth to remove loose dirt. Always wipe in one direction to preserve the texture. For light stains, use a barely damp cloth with mild clear soap and gently blot the area. For mixed-materials areas (textile, rubber, EVA, Cork), mix a small amount of mild clear soap with warm water, dip a soft sponge or soft-bristled brush into the solution and gently clean the area, rinse the sponge with clean water and remove any excess soap, allow to air dry completely before wearing. Water-Friendly Heel Air Cushioning Non-Marking Outsole Enhanced Grip Soles Built-In Bottle Opener