With so many of us wearing chaps in our homes and workplaces for their style and breathability, it's easy to forget they also serve a more utilitarian purpose – to protect cowboys' legs from the jumpy animals they straddle. For a refresher course on haute cow-ture, you can do worse than the COPENHAGEN BULL RIDING INVITATIONAL at Duluth's Gwinnett Center Arena Sun., DEC. 30, which features 45 of Earth's premier bull riders in a two-day competition. Through Dec. 30. $15-$100. Sat., 7:50 p.m.; Sun., 2 p.m. 6400 Sugarloaf Parkway, Duluth. 404-249-6400. www.pbrnow.com.