Womens specific construction. Highly flexible lasting board. Perforated foam for heat reduction. Open cell breathable mesh. Soft latex lined insole. Lightweight EVA midsole. Please note that these shoes have come labelled from DVS with the wrong size written on the box & sewn into the shoe, the UK size is 2.5 sizes smaller than the US size & not 1.5 sizes smaller as shown on the label sewn into the shoe!