Not just for formal affairs (or for men, for that matter!), trousers with tuxedo styling—a cummerbund waistband or a strip of satin down the outside of each leg—are cropping up in women’s clothing everywhere. Good news: They’re not intended to be worn with tails, a vest, or a bowtie. Instead, use the surprising design detail to inject a little interest into unexpected pairings, like a slinky silk cami, or a plain white t-shirt. A few dapper touches (satin trim, sequin piping) make these just-formal-enough trousers perfect for all sorts of festive occasions, especially if you’re not the type to wear a dress. Find the pair that suits you best with help from these expert tips.