Materials: EVA insole, leather and poly mesh. Comfortable, Fashionable, Casual The positive effect of the MBT Shoes is based on the principle of "natural instability." These shoes help improve posture, reuce back pain, and alleviate joint pressure. Benefiting the whole body, these MBT Shoes are truly a blessing. I bet you will feel very comfortable, then you will attracted by the lovely sneakers. High safety and prompt delivery is guaranteed; More items you buy, more discount you'll get;