Flannel is optional but encouraged on Big R Radio's 90s Alternative Rock channel, part of the multi-channel Big R Radio network carried on Live365 from Mill Creek, Washington, near Seattle — fittingly close to grunge's birthplace. The format is a full decade immersion: the alternative and guitar rock that defined the 1990s, from Seattle grunge and Britpop imports to college-radio staples and one-era wonders. Sister channels cover everything from country oldies to Christmas classics, but this one never leaves the nineties.