adidas adiStar Raven Boost running shoes are constructed with highly durable upper materials that are built to take the beating of the trail. Ballistic welding gives them rugged appeal and reliable performance. The Continental bike-tire-profile is inspired by trail bikes and will allow you to adapt to better to changing terrain.Upper: Speed lacing offers a secure fit. Padded tongue and heel collar enhance comfort. Padded tongue and heel collar enhance comfort. Mesh offers breathable flexibility.Midsole: boost™ midsole provides unmatched energy return and superior cushioning. EVA cradle provides support in the midfoot and forefoot. Outsole: Continental rubber outsole delivers 21% more traction in dry conditions and 23% more traction in wet conditions. 40 outsole lugs allow for traction on all terrain.