leotard

A snugly fitting, stretchable one-piece garment with or without sleeves that covers the torso, worn especially by dancers, gymnasts, acrobats, and those engaging in exercise workouts.

A skin-tight one-piece garment with long sleeves and no legs, often worn by dancers, acrobats etc.

a tight-fitting garment of stretchy material that covers the body from the shoulders to the thighs (and may have long sleeves or legs reaching down to the ankles); worn by ballet dancers and acrobats for practice or performance