From Dansko, the Millie Leather Swivel Strap Convertible Clogs feature: High-quality leather upper Adjustable buckled swivel strap converts to a slingback Combination of 100% recycled bamboo carbon yarn linings and chrome-free leather Chrome-free leather socklining for breathability Cushioned, energy-return PU footbed for lightweight comfort Lightweight BPU midsole with steel shank for supreme stability Slip resistant rubber outsole suitable for dry, wet and oily/wet surfaces Approx. 1” heel height  Imported.