▼Product Details ・Color: Black/Azure ・Material: Micro-suede ・Sole: Vibram XS Grip2 (3.5mm) ・Size: EU40 Usage: I still had my main shoes, so I used these for breaking in my feet at the gym. I used them about 3 times for about 30 minutes each time. I wore socks with them. The white powder inside is from using Grans Remedy for deodorizing. Since these are used items, please refrain from purchasing if you are sensitive to such things.