If you know NSF, then you know this: the label's a go-to for easy knits, polished but not overly complicated separates, and a cool, tomboy aesthetic. Its evolution from menswear brand to a women's line with an independent SoCal spirit that draws closely on its menswear roots is now a mission that creative director Jamie Haller will confidently expand. With more than 10 years of experience as a designer in LA, plus a memorable run at the helm of Ever, a brand she relaunched as an instant success (with a major celebrity following) in 2008, Jamie has big plans for taking NSF into even more awesome territory. For starters, she's expanded the collection's base of knits to include a selection of soft, drapy sportswear, Italian leather finishes, and Japanese hand-processed denim — and it's only been about a year since Jamie took the reins. Keep reading to learn more about the very talented Miss Haller and just why we're crushing on the creative director and her very cool-girl collection.

• On the NSF girl: "Relaxed, casual, and cool are words that best describe the NSF girl. She is free spirited, easygoing, [and] timeless, but with a forward sensibility. Our customer wants to be both laid back and yet look pulled together, to be styled, and yet understated."
• On what inspires the collection: "Everything. I try not to be too rigid about how the collection comes together. It is a very organic process. I look at a lot of different fabrics, silhouette inspirations, vintage. I go flea market hunting, we scour our own closets for old favorites, and I borrow from the boys. We sit around and daydream about good ideas and what we would be really excited to design or wear. Sometimes something as simple as a distressed old tee can be really inspirational. Pulling the collection together is an evolution. I trust that sometimes what we do at the last minute is often the best thing in the line."

Read on for Jamie's fashion icons, Fall dressing tips, and a look at our favorite NSF Fall pieces.

Have a case of the Mondays? We've got something to cheer you up. Luxurious basics label James Perse launches its online private sale Wednesday, offering up to a generous 40 percent off its beautiful staples through Nov. 30. But here's the icing on the cake: PopSugar Shop's secured you exclusive two-day-early access to the sale!

With timeless pieces for both ladies and gents, the sale is chock-full of Fall staples and holiday gifts. We're filling our shopping cart with sheer white blouses, cozy wrap cardigans, ombré sweaters, pocket t-shirts, and crewneck sweatshirts. Shop now ahead of the pack!

The Winter dress code has everything to do with balancing the obvious lineup of warmth-trapping components, and then somehow parlaying that slightly bulkier look into something cute and polished. Yes, it can be a tough equation to solve — we're definitely guilty of throwing on our puffer coats and calling it a day — but that's why Sienna Miller's latest wintry ensemble is a great excuse for not falling into a cold-weather rut. Her easy outfit consists of minimal layers (with a focus on thicker materials), lots of texture, seasonal hues, and a no-fail boot that you probably already own. In other words, style up a warm-toned sweater with (faux) fur outerwear, just like Sienna did with her bobbled cable-knit topper and dark brown fur coat. Then, pair the laid-back combo on top with your favorite pair of slim-cut jeans and ankle boots à la Isabel Marant's iconic Dicker boot. Bonus points if the jeans happen to feature a lace-up ankle detail, too. That's it. The look proves perfect for a chilly day, all without having to rely on grandiose styling or, for that matter, a lot of pieces to pile on. Ready to take on Sienna's Winter wardrobe? Shop our key picks below.

Clockwise from top left: Ruby & Ed Faux Fur Coat ($341), Topshop Moto Vintage Skinny Leigh Jeans ($76), Isabel Marant Dicker Boots ($565), Burberry Brit Cable-Knit Cotton-Blend Sweater ($595)

• Christopher Kane and Versus part ways — WWD
• Don't call Sarah Jessica Parker a style icon — People Style Watch
• 50 Years of the Stones means 50 years of Mick style — The Daily Beast
• Coach gets the Anna Sui treatment — Fashionista
• These iPhone apps could make your holiday shopping a lot easier — Lucky
• Apparently Saks has a Yeti and he's on Pinterest — Racked
• Kate Moss talks about her million-dollar tattoo — HuffPost Style
• Grace Coddington gets a haircut — and gets back to modeling — The Cut
• Karlie Kloss gets in touch with nature for T Magazine — Styleite