Alpina's Frontier XC are an extremely lightweight, smooth riding pair of Nordic skis....so light that they'll make gliding feel like a stroll through the forest, which is the idea, after all. This ski makes use of a wood core, wrapped in layers of air-channeled fiberglass. The wood keeps the ski durable and strong for years, and the aerated fiberglass keeps the weight down while also giving a glossy topsheet that won't let snow stick (again to keep the weight down). These XC skis have a multi-grip base which helps keep you from sliding back on uphill climbs without impeding your forward progress. These XC skis have no metal edges (again to keep them light), so they will best be used on groomed trails, and pre-broken tracks.