Birkenstock Women's Arizona  Birko-Flo Mocha Sandals - 37 M EU - 6-6.5 US Women - Normal/Regular Fit Birko Flor Arizona Sandal from Birkenstock is made of soft acrylic and polyamide felt fibres. Synthetic sole This iconic two-strap style, the Birkenstock Arizona Sandal, is known for being the epitome of comfort. They fit roomy, both in length as in width as intended for orthotic arch support so go down a size if you like a tight fit and never plan on wearing socks. The suede lined, contoured footbed will mold to the shape of your foot creating a custom footbed that supports and cradles you each and every step. Flexible EVA outsole offers lightweight, shock absorbing support with lasting durability. Please note: Birkenstock makes the Arizona Sandals intentionally roomy for added comfort so they tend to run about 0.5 longer than usual and they are also wider than usual. Most people prefer it this way as the straps can always be tightened if needed!