Whether you're working up to your first ultra marathon or running your tenth, you're going to need a shoe that strikes an optimal balance between comfort and cushioning. That's precisely where the Inov 8 Women's Race Ultra 290 Trail Running Shoe comes into play. This long distance specialist supports your foot without inhibiting flex or ground feel, thanks to its 8 millimeter drop and Meta Shank III that aligns with the individual metatarsals in each foot. In addition, the shoe's injected EVA midsole smooths out rough terrain when you're running over rocky trails and uneven surfaces. Combating nasty microbe growth, the shoe's X Static footbed incorporates silver into its design for antimicrobial properties. The shoe's Race Ultra Sole uses 4 millimeter lugs for strong grip over hard surfaces without sacrificing stability when you encounter loose gravel or rock strewn trails. This sole uses a TRI C compound that blends soft sticky, hard sticky, and endurance strength rubber into its design, offering the best of grip, durability, and traction when you're traveling serious miles over varied terrain.