The product is a Birkenstock Birki Double Adjustable Strap Women's Sandal in ultra blue color. It features a solid pattern, hook and loop closure, flat heel, and adjustable strap for a comfortable fit. With a US shoe size of 6 and EU shoe size of 37, this slide-style sandal is designed for women and made with synthetic upper material in Germany. The Birkenstock Birki model offers a high-quality and durable footwear option for everyday wear.