Aero Tech Designs' classic compression short. Ideal for exercise, the tricot knit microfiber to hug and compress your muscles during exertion. Why compression? Proper fitting spandex/nylon activewear increases blood circulation which oxidizes the muscles during exercise. More oxygen, in turn, will reduce the buildup of painful lactic acid. Muscle fatigue is reduced and your body's performance is increased. Post-workout, increased blood flow helps heal muscles and limit delayed onset muscle soreness (DOMS). Compression shorts will feel like your second skin and we guarantee that our full product line will provide years of functionality, support, and performance-enhancing comfort. Composition: 84% nylon/16% spandex four-way stretch tricot knit fabric; 3/4 inch elastic waist; smooth flatlock seams to prevent chafing. Five color choices in regular and plus sizes. Machine wash and air dry. All shorts are made in the USA.