The inclusion of Birkenstocks into a modern wardrobe continues with the new collaboration with Concepts, re-imaging the popular ‘Boston’ design. The new iteration comes in two holiday colorways: vibrant orange and natural leather. The vibrant orange felt upper is teamed with natural leather straps and a brass buckle. The alternative sports a natural leather upper, natural leather strap and brass buckle. Both come with the signature Birkenstock sole and these will be released exclusively in-store at Concepts, December 20 and online at 10 a.m. EST.