a.k.a. golfing knickers, plus fours, breeks (which I think have less overhang below the knee), plus twos (ditto). Hard to acquire in Australia. But see international suppliers Kings Cross Knickers who do some loud golfing fashion. Golfknickers.com has some actual nice plaid (although are in polyester). loudmouthgolf do made-to-order knickerbockers with fabric patterns reminiscent of Windows 3.11 freeware wallpaper, or posterized vomit. So does Royal & Awesome but with more amusing names and a higher cotton content. (but only plus twos, not plus fours) readygolf are a reseller occasionally offering good deals.