US sizing. The Kaha 3 combines Hoka's soft feel with light ankle support. Good choice for long day trips and weekend trips. Compared to the Kaha 2, this model 3 has a more advanced midsole, now utilizing two densities of EVA foam. It also uses Gore-Tex Invisible Fit technology, improving the fit and keeping your feet dry. - Narrower and smaller than average Hoka shoes. Please choose half a size bigger than usual - Genuine Gore-Tex membrane - 45% of the surface fabric is recycled fiber - Outsole: Vibram Megagrip - 5 mm depth of the pattern - Highly cushioned EVA midsole - Meta-Rocker construction helps towards a rolling stride - Drop: 8 mm