Product Details Delivering long-haul comfort for long trail runs and races, the women's Caldera 7 combines premium cushioning with a durable, dynamic feel and stability over uneven terrain. Sustainability 42.1 %Recycled materials in the upper 4.48 Plastic bottles diverted from landfills This product is a certified CarbonNeutral® product. Best For… Trail Running Durability All Day Comfort Traction Features Supreme softness Stable ride Durable & dynamic