Why is athletic apparel so expensive?

Any good inexpensive online stores? I just need loose-fitting comfy drawstring pants (NOT sweatpants). Nothing fancy with all kinds of bells & whistles.

http://www.championcatalog.com/webapp/commerce/command/ExecMacro/StoreFront.d2w/report

Champion is some basic stuff, well priced too. Only problem with Shopping Online is the shipping costs which is $5.95

EXPRESSION 06 EVOLUTION LUXURY ATHLETIC APPAREL COMMERCIAL FINAL