"Men's Mount to Coast® R1: The Men's Mount to Coast R1 is a neutral trail running shoe built for runners who go long - ultrarunners and distance athletes who need consistent cushioning and a secure fit from the first mile to the last. At 8.5 ounces with a 35mm heel and 27mm forefoot stack, the R1 sits in a range that gives you real cushioning underfoot without feeling heavy on the trail. The GOFLOW™ midsole geometry encourages a smooth heel-to-toe transition, which helps keep your stride efficient when fatigue starts to accumulate deep into a run.What makes the R1 worth a closer look is how it handles the realities of long efforts. The ZeroSag Dual-Zone Midsole Inserts are engineered to hold their shape over the course of a race, so the cushioning you feel at mile one is still there at mile 40. The LightCELL™ Midsole Base keeps the shoe under 9 ounces while still providing enough bounce to keep your legs feeling fresh late in a run. The TUNEDFIT™ Dual Lacing System gives you two independent lace zones - one across the midfoot and one across the forefoot - so you can dial in the fit as your feet change during long efforts without sacrificing heel hold. The double-layered jacquard upper, made with 40% recycled polyester, moves air through the shoe and adds structure without unnecessary weight.Why Our Fit Experts Love This Shoe""I took the R1 out on a long trail run and the thing I noticed most was how consistent the cushioning felt toward the end. My feet had swollen a bit, so I loosened the forefoot laces without touching the heel zone - that alone made a real difference in comfort over the last few miles."" - Sullivan, Road Runner Sports Fit Expert, Naperville ILWho It's Best ForIf you're a neutral runner training for or racing ultra distances on the trail, the R1 is worth serious consideration. It's a good fit for runners who want a lightweight trail shoe with meaningful cushioning that holds up over long efforts - not just at the start. The dual lacing system makes it especially useful if your feet tend to swell on longer runs and you need a fit that can adjust without starting over. VIP Family members can take the Men's Mount to Coast R1 for a 90-Day test drive with our Perfect Fit Guarantee."