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 Swim Trunks:
Swim Trunks are shorts for men used for the purpose of swimming. Swim Trunks will often have netting as the liner and a drawstring at the waist for an adjustable fit.