The Ruska shoes are made from durable faux leather, with a waterproof Gore-Tex membrane inside the structure. The Pomar Nordic Grip+ outsole is made from a highly grippy material blend that remains flexible even in freezing temperatures. Easy to put on thanks to the zipper. - I-width last: wider than the average Pomar last, which is not that narrow to begin with. - Upper material: microfiber suede - Gore-Tex membrane keeps water out - Removable Pomar Sport insoles This product does not contain animal-derived materials.