Leggings
From wipipedia.org
Leggings are a tight garment that covers someone from the waist to the ankles, resembling a pair of opaque footless tights. They emphasise the buttocks and thighs, and on men the male bulge.
Some leggings (cropped leggings) only come to just below the knee, or half-way down the thigh.
They may be made of a range of materials, usually stretchy to permit extra tightness, such as lycra and latex.
Leggings designed to look like very tight jeans are called jeggings.