The Ultima is Vegan utilises a 100% recycled Rip-Stop material as part of the upper and has a WP membrane.Vegan FriendlyRecycled rip-stop nylonWaterproof and breathable bootie membrane keeps feet dryAthletic last for agility and comfortHi-Poly PU anti-bacterial foot-bed for comfort and anti-fatiguePU heat welded upper construction reduces weight and offers support and comfortLightweight and durable outsole with blown EVA midsole for support and all day comfort