Lafuma Women's Moon Race Trail Runner 100% Synthetic and mesh Rubber sole Designed specifically for the needs of ultra trail runners, including great cushion, stability, grip (Vibram Advance Trail Rubber), and protection The midsole, made of Tri-density EVA and additional EVA and polyurethane inserts, reduces the first impact on the foot by providing absorption of shock as well as additional support Twin-lace System which enables tightening of both the front and back of the shoe creating a perfect fit that holds in all types of terrain and is easy to adjust Stabiflex system provides stability and extra flex creating a supportive and comfortable fit