I purchased these for entrance exams, but only used them once for the kindergarten entrance test. I changed from my everyday shoes right before the test, and wore these indoor shoes during the test, so I only used them for about 10 minutes in total. These are black formal shoes made of synthetic leather, with Velcro straps for easy on and off. - Color: Black - Size: 16.0 - Style: Formal Shoes - Material: Synthetic Leather - Design: Velcro Straps Thank you for looking.