Trail, mountain and forest runner for the unintimidated. Uphill races, orienteering, 'Born to Run' aficionados. Cross country, recreational racers. Weight? What weight??!!! Acceleritas is superlight. Terrain feel is remarkable. The shoe is very flexible and fully allows the natural movement of the foot, like running in a pair of socks, but socks that provide thermal and impact protection, and traction. The sole is designed with a sole pattern that is optimized to grip on hard as well as on soft surface. It has a special rubber compound and an aggressive pattern where dirt is steered away to the sides in diagonal channels (it’s the same principal as in tractor tires). Very durable materials with minimal water pickup. Ultra heel lining grabs foot and decreases friction and blisters.