Birkenstock Kairo is a convergence of a classic thong style with a form fitting backstrap sandal to produce total function in a fine-looking sandal. The Kairo, a great new Birkenstock is magnificently designed and the materials and construction as always from this brand are of the utmost quality. This Kairo sandal mirrors the anatomy of the foot as closely as possible. Toes are normally squashed together by the frequent use of narrow fashion shoes. Birkenstock Kairo thong sandal gently steers toes back into a more natural position. The Birkenstock Kairo has a fully adjustable strap and a shock absorbing EVA sole. The thong is it this season.