These running shorts are light weight and perfect for novice and pro runners alike. They are size Small (I personally feel like they run a tad on the small size). They offer two small internal pockets in the front, and a larger reflective zip pocket on the back. They also include a liner inside the shorts. Low rise waist. According to the website: Made from: 89% polyester & 11% spandex rabbitMESH liner: 95% polyester & 5% spandex