Most of Pearl Izumi's Sensor fabrics are blend of polyester and Spandex, but the Vera Short is different by design. While it does offer similar wicking properties, this Sensor fabric is a soft combination of durable nylon and stretchy fabric, making this short a prime pick for hard workouts and extended runs. The Vera Short has a non-binding waist design with flatlock seams to eliminate the possibility of chafing. A small side pocket holds your key or any other small essential.