Women's Birkenstock Birki's Catalina Patriotic American Flag single strap slide sandals. Excellent pre-owned condition with no scuffs, no abrasions, no worn spots and no offensive odor. Very cute sandals. Colors: Red/ White/ Blue Size: 6 - 6.5 (Euro 37) Previously owned and worn, but not much. There is very little evidence of wear on these cute Birkenstock Birki's. See pics. Notes- Patriotic Catalina sandals from Birki’s by Birkenstock, featuring a signature red, white, and blue stars-and-stripes American flag design. Material: Birko-Flor uppers with a cork and latex footbed for comfort. Style: A single-strap slide design with an adjustable buckle. Origin: Marked as made in Germany, which is a hallmark of the Birkenstock brand.