Keen - Isabella Slide (Storm) - Women's: Zappos.com and Keen suggest that you buy a 1/2 Size down from your normal Keen size in the Isabella. Woven, unlined leather upper. Metatomical footbed. Compression molded EVA midsole. Patented toe protection. Tire-tread lug design. Anti-slip, non-marking, carbon rubber outsole with inset linen fabric.