These are typically compression or gym shorts designed for sports and workouts.
Brand and Type: The waistband clearly shows the "Under Armour" wordmark, indicating the brand. They appear to be performance or compression shorts, part of the brand's athletic apparel line.
Features: These types of shorts are often made from lightweight, sweat-wicking fabric that dries quickly.
Use: They are commonly used as a base layer or for various physical activities such as running, basketball, or gym workouts, providing muscle support and comfort.