Altra Lone Peak 4 Men's Trail Running Shoes Black/Red : For those choosing the path less traveled, wanting to climb the highest peaks, no matter the conditions, the Altra Lone Peak 4.0 is here for you. This trail favorite is back with updates to the upper that make it ready for traversing the Rain, Snow, and Mud (RSM). Microscopic pores built into the waterproof eVentA(R)upper material provides protection from the elements while allowing feet to breathe. Improved TrailClaw(TM) lugs provide superior traction on even the toughest trails. Upper: Updated, durable mesh upper provides better durability and features an integrated tongue and added drainage capacity. Waterproof eVentA(R)upper material provides breathable protection from the elements. Lace-up front offers an adjustable fit. Midsole A Zero Drop(TM) platform with a FootShape(TM) toe box allow the toes to relax and spread out naturally and the big toe to remain in a straight position for more stability and powerful toe-off to maximize running performance. Stone Guard(TM) offers flexible protection from the rugged terrain by deflecting rocks into the midsole for a smoooth, stable ride. Outsole: TrailClaw(TM) and carved out lugs enhance traction further.