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 Underwear:
Underwear refers to any article of clothing designed to be worn under the clothes and close to the skin. Articles of Underwear for women may include, but are not limited to; bras, sports bras, bikini briefs, boy shorts etc. Articles of Underwear for men may include, but are not limited to; boxer briefs, briefs, cotton t-shirts, base layer pants, etc.