The Salomon Elios 2 Mid XCR is a casual mid-height boot that provides all day comfort & GORE-TEX with XCR Product Technology weather protection. Made using a combination of textile & waterproof oiled Nubuck, it features a moulded EVA midsole & a Contagrip outsole. Glossary: Nubuck: Similar to suede but stronger & thicker with a fine grain. It has a velvet-like surface & is resistant to wear. Contagrip: Durable, abrasion resistant rubber gives grip on all terrain types. Different variations are used to ensure the right rubber is in the right place for the right activity. EVA: Ethylene-Vinyl Acetate, a polymer used to absorb physical shock, used in athletic materials.