Vionic Beach sneakers are designed with materials that make a difference. Stinson is a cool lace up designed with earth-friendly washable materials, colorful side panel stitching & eyelet details. Vegan certified. The shoe uppers made of earth-friendly produced cotton. No animals were harmed in the making of these shoes. The sustainable outsole is 80% rubber and 20% soybean based-compound. Did we mention they are machine washable? To clean, remove insoles before placing shoes into washing machine. Use cold water and air dry only. Do not use a machine dryer; extreme temperatures may cause shoes to shrink. For the greatest comfort, we recommend wearing your new Vionic footwear for just a few hours for the first few days to allow your feet to adjust to the new level of orthotic comfort and support. Within one to two weeks you should find the product completely comfortable and supportive. There’s a science to our style- Vionic shoes provide essential stability and addictive support.With contours seamlessly engineered into each and every pair–from flip flops to heels– Vionic helps support natural alignment from the ground up, in looks you’re going to love.