Shaping Shorts are knit differently on various parts of the shorts, and have a firming effect on the tummy and thighs. Lifting panels are knit in the back to lift and shape the bottom. If you want to leave your legs bare, shorts are a great alternative to shaping tights. Perfect under dresses and skirts, or under thin trousers. The material is sheer with a smooth finish, letting clothes fall evenly over the shorts without clinging.