Your unmentionables? They’re organized like some OCD science project. Pretty pairs for special occasions, granny pants for lazing around, low-rise cotton thongs for every day.

But one slip into a pair of Fifi Chachnil briefs, and your undie drawer will need a major reorg.

No ordinary Parisian lingerie, the delicate creations defy categorization. It’s the details — a transparent trim along the cleavage, a froufrou frill in the seam, a gathered decollete along the bodice — that make this collection so unique.

Mademoiselle Fifi is all about celebrating coquettishly sexy contradictions. How else to explain her fondness for checkered push-up bras, frilly white knickers, and dotted tulle corsets? As for sexy cabaret garters with black and white gingham, baby doll negligees in Candyland colors, and barely there silk chiffon briefs with poetic flowers, you may wonder how you ever got along without them.

And how you ever let yourself sport granny pants.

Available at Raizy, 1944 North Damen Avenue, between Armitage Avenue and Homer Street (773-227-2221 or shopraizy.com).