Complex sentence: Pantyhose (called tights in the United Kingdom and a few other countries) are sheer, close-fitting legwear, covering the wearer's body from the waist to the feet.
Split into simpler sentences: Pantyhose (called tights in the United Kingdom and a few other countries) are sheer hosiery. They are close-fitting legwear, which cover the wearer's body from the waist to the feet.