The Kay SL combines all the benefits of the Birkenstock classics, Tokio and Boston, in one model. The upper instep strap can be folded back to serve as a heel strap, providing additional support. The SuperGrip sole is slip-resistant, offers ideal rolling movement, and is oil- and grease-resistant. Its EVA midsole features extra soft cushioning, providing long-lasting and reliable shock absorption with every step, even for sensitive feet. This high level of flexibility and stability is particularly valued in medical settings. All SuperGrip sole models are tested for slip resistance according to EN ISO 20347:2012. It features an anatomically shaped cork-latex footbed with additional soft padding, a SuperGrip sole with a shock-absorbing midsole made from lightweight, flexible EVA, and a slip-resistant, oil- and grease-resistant rubber outsole. The slip resistance has been tested according to EN ISO 20347:2012 (Category SRA). The strap can be folded back for additional stability at the heel. The individually adjustable metal pin buckle ensures a perfect fit. The natural leather surface is untreated and recognizable, while the skin-friendly, flexible leather insole gently conforms to the footÕs shape. The open-pored, breathable surface ensures a pleasant foot climate, even during intense physical activity. The deeply molded heel area supports the foot tissue and keeps the heel bone stable in its natural position, providing almost the same support as a closed shoe. Width: normal, Size: 39.