Altra Lone Peak 4 Low RSM Men's Trail Running Shoes Burnt Orange : 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 the Rain, Snow, and Mud (RSM). Microscopic pores built into the waterproof eVentA(R) upper material provides protection from the elements while allowing your feet to breathe. Improved Trail Claw(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 toes to relax and spread out naturally while the big toe remains in a straight position. Reduces overpronation, enahnces stability and create a powerful tow-off for running efficiency. Stone Guard(TM) offers flexible protection from the rugged terrain by deflecting rocks into the midsole for a smooth, stable ride. Outsole: TrailClaw(TM) and carved out lugs enhance grip and traction where its needed the most.