Oswego Canvas-Suede in Color Sandcastle | BIRKENSTOCK US。Birkenstock Oswego slip-on sneakers in Sandcastle beige feature a breathable textile knit upper with suede leather accents at the heel. Designed with a regular fit, these casual shoes include the signature anatomically shaped cork-latex footbed for superior support and comfort. The flexible rubber outsole provides reliable traction, while the elastic gore inserts ensure an easy on-and-off fit. Ideal for everyday wear, these versatile flats combine a clean aesthetic with the legendary Birkenstock comfort system.