New DERIT TECH Functional Shorts Size: M Color: Black Please understand that these have been stored at home and will be shipped with simple packaging. Just by wearing them, the muscles around the pelvis are activated, and your body naturally learns to maintain good posture. DERIT TECH was developed by a physical therapist who supports many famous athletes. Humans receive instructions from skin sensory receptors on whether to activate or relax muscles. DERIT TECH utilizes the "Low Muscle Pressure Theory®," which takes advantage of these skin sensory receptors, and features unevenness on the fabric to move the muscles around the pelvis. This allows the pelvis to be guided into a correct neutral state without excessive fixation or compression.