Hydro Leather, water friendly & Vegan. Soft webbing toe strap. Textured non-slip, quick dry EVA foam. Zoned Out Midsole: dual density design with firm supportive foam in the arch/heel and super cushy rebound foam in the forefoot. Assembled with Water Based Glue. No-slip, non marking sponge rubber. Designed for heavy exposure. This style is Vegan friendly, contains no animal materials or by-products.