80% Synthetic / 10% Rayon / 10% Rubber Imported Synthetic Material Rubber sole Shaft measures approximately Normal from arch Platform measures approximately .50" Free Running & Free Speed: Elastic and breathable mesh upper with softness and excellent flexiblity, ensures your feet fit closely and feel more freedom, allowing to move the way they were meant to, to enjoy the unparalleled pleasure of free running, bring new speed feeling to you . Special Sole design:Non-slip sole with blade design give your full powerful support and comfort for your feet . Arch support insole gives the midfoot the best support when you move. Provide adequate protection for your free running. Light-Weight & Breathable: Fashion mesh upper for ultra-lightweight support and breathability can maximizes the upper surface,let your foot always keeps dry and cool. The breath holes all around the vamp help your feet take a deep max breath. WEAR RESISTANCE & PROTECT ANKLE: The rubbe with high-density cushioning outsole protects the feet from sharp but also reducing the risk of your ankles' sprain. And the fashion and unique design, it's perfect choice to pair with any occasion: casual, walking, running, training, indoor, sports, outdoor, travel, exercise, workout and so on. It's very easy to choose the right clothes to match. PRIORITY: In DUORO, you're taking no risk with product quality problem. We offer 100% no risk money-back guarantee if you're not thrilled with product quality problem for any reasons. Just tell us and we will do our best to give you the most satisfactory solution. Worry-free fulfilling service for you-pls email us if there is any problem.