These white Birkenstock X CSM Cosy padded sandals feature chunky straps, Velcro fastenings and contrasting black soles with moulded footbeds. The insole is inscribed with collaborative branding. We can tell from these Birkenstock X CSM sandals that MA Fashion graduate Dingyun Zhang shares our definition of ‘cosy.’ This is pretty much the footwear version of a king size bed.