Apparel is the term used to describe pieces of material that are crafted to be worn on the body. Apparel items include (but are not limited to): Tops, Bottoms, Skirts, Shorts, Sweaters, and Swimsuits.
About Bottoms:
Bottoms are an apparel term used to describe the layers of clothing worn on the bottom half of the body. Bottoms may be in reference to Undergarments or Outerwear.