Made from a very coarse plastic-like material. The tip was very light but felt very cheap. My legs started to hurt after the first 15 minutes. I bought some spare earbuds, well that didn't help at all. It felt like the top of my foot had been bruised or cut. I already have horrible ankles, I know for sure I'd be turning over in minutes. The tongue is sewn on at the front and I knew it would only take a few plays before it came loose. Very disappointed in Adidas. I immediately put them back in the box and returned them within the first week.