Measurements Information (chest/ inch,Weight /pound): M: 30~33 inches, 100~125 pounds L: 33~36inches, 125~150 pounds This women s sport tank top is designed with cooling features and compression zones that transforms the torso and chest. It's light enough to keep you cool on the hottest days of summer? Whether you're breaking a sweat at the gym or running errands on the weekend, this racerback won't hold you back. The shirts are made from flexible, breathable materials to stretch over bodies comfortably and have a compressing feel on abdomens and backs. You can wear it for walk,Cycling,run,fitness. It can also burn fat,shape your body.