Double your nightie as a sexy blouse with a cardi or blazer on top.
Lace nightie, H&M, $25, hm.com.
Curl up on the couch in a pair of snug leather leggings.
Leather leggings, Mango, $189, mango.com.
This piece takes the cozy feel of sweatpants and transforms it into a sexy mini dress.
Sweatshirt dress, Uniqlo, $20, uniqlo.com.
Keep your style low key and make a statement with your jewels.
Enamel deco stretch bracelet, Accessorize, $35, accessorize.com.
Leather sleeved sweater dress, Mason, $315, intermix.com.
Add a little edge to your flats in a pair that's sexy, studded and pointed.
Studded pointed ballet flats, Steve Madden, $123, asos.com.
Nothing is cozier than a simple tee; and this one-shoulder design lends a flirtier feel.
Asymmetric jersey T-shirt, CLU, $69, netaporter.com.
Spice up your sweats with a more tailored style that looks equally chic with heels or wedge sneakers.
Tapered sweatpants, H&M, $35, hm.com.
If you opt for a heel, make it an understated style that is still sleek.
Ankle boot, Dorothy Perkins, $75, dorothyperkins.com.
Layer this drapey cardigan over a cute camisole or even over a pair of jeans and a tee to dress it up.
Draped cardigan, Helmut Lang, $140, lagarconne.com.
Over-the-knee riding boots are the flirtiest flats to wear; they lengthen your legs without having to wear heels.
Suede over-the-knee boot, Nine West, $90, ninewest.com.
Logo cuff, Tory Burch, $165, toryburch.com.
If the merino wool isn't enough to keep you cozy, this racey shade of red will certainly turn up the heat.
Merino wool sweater dress, Calvin Klein, $149, theoutnet.com.
This blazer looks good but feels even better. The structured lapels polish things up, while the drape pockets casually tone things down.
Draped pocket blazer, Newport News, $24, newportnews.com.
Keep things subtly sexy in a see-through blouse with a cute cami underneath.
Sheer blouse, Eight Sixty, $47, lordantaylor.com.
This cami works double-duty, layered beneath or worn simply as a pajama top for bed.
Printed camisole, Topshop, $52, topshop.com.
The popular "smoking slipper" was designed for lounging around the house fabulously.
"Lunna" smoking slipper, DV by Dolce Vita, $80, piperlime.com.
Sweater dress with faux leather trim, Dorothy Perkins, $39, dorothyperkins.com.
"Reign" riding boot, Arizona, $50, jcpenny.com.
Kick back in a homey chunky knit dress.
Turtleneck sweater, Maison Martin Margiela with H&M, $129, hm.com.