Your Ultimate Guide to Cool-Girl Style + a COS Giveaway!

The exact qualities of a cool girl can be hard to define, but after years of studying the best street style sites and bloggers, we can confidently say we’ve zeroed in on their signature styling tricks. From mastering the perfect shirt-tucking technique to the most effortless way to carry your bag, read on for eight tips totally worth cribbing. Just in case you need a little extra convincing to adopt their stylish ways, we’re also giving away a gift card to COS (the global brand beloved by cool girls everywhere) in honor of the store’s brand new Beverly Hills location opening tomorrow.

Scroll down to check out our tips for copping cool style, and enter the giveaway to put these chic suggestions into practice.

Tip 1: Add sneakers to any outfit—seriously almost any outfit.

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Mija

On Mija Flatau of Mija: Set Pea Coat ($443), Men’s Shirt ($127), and Classic Trousers ($127); Chanel bag; Adidas sneakers.

Tip 2: Master the half-tuck.

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Vanni Bassetti/Getty Images

On Laura Catrina Poses: Joseph jacket; COS shirt; Zara pants; Comme des Garcons bag; Saint Laurent shoes.

Tip 3: A hands-free bag, whether it’s a cross-body or a backpack, always looks more effortless.

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Trines Wardrobe

On Trine Kjaer of Trines Wardrobe: Ganni coat; Mads Norgaard shirt; Weekday pants; & Other Stories shoes.

Tip 4: Embrace the oversized.

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Fash N Chips

On Christine Reehorst of Fash N Chips: COS coat; Mango culottes; Superga Cotu Sneakers ($49); Michael Kors Sport Watch ($250); Zara sunglasses.

Tip 5: Really commit to a single color.

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Look de Pernille

On Pernille Teisbaek of Look De Pernille: Zara Turtleneck Vest With Slits ($80); COS Wide Leather Belt ($69) in Maroon; By Malene Birger skirt; Yvonne Kone heels.

Tip 6: Throw a scarf over your shoulders for a nonchalant effect.

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Maja Wyh

On Maja Wyh: Zara top; vintage skirt; Zara Leather Court Shoe with Straps ($80); VYVYN Hill x MAJA WYH Black Silk Scarf ($152).

Tip 7: Mix trendy items, like futuristic sunglasses, with classic pieces, such as a camel coat.

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The Fashion Eaters

On Tine Andrea of The Fashion Eaters: H&M turtleneck; vintage skirt; Stuart Weitzman 5050 Stretch Suede Boots ($635); Mulberry bag; Karen Walker sunglasses; Daniel Wellington watch.

Tip 8: Borrow pieces from the boys, like a menswear top.

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Berta Bernad

On Berta Bernad: Roberta Torreta coat; COS shirt; Pedro del Hierro pants: Gerard Darel shoes.

To win the COS gift card, follow the steps below:

1. "Like" - Head over to Who What Wear's Facebook page and like us! 
2. Comment - Comment below with what you’d like to see more of on Who What Wear.
3. Shop - This is completely optional, but if you’re in the area, check out COS’ brand new store in Beverly Hills. (If you like awesome, affordable clothes, why not?!)
4. Wait - We'll announce the winner a week from now, on November 5, 2014.

The Fine Print:
-This contest is open to residents of the U.S. only.
-Winner will be contacted via their Facebook account. If our team does not hear back from you within 24 hours, a new winner will be selected.
-Limit one comment per entry. Multiple comment entries will not be considered.
-This giveaway ends at midnight PST on Wednesday, November 5.
​-This is not a sponsored giveaway.