Mia Huelsbeck is a writer who covers fashion, lifestyle, entertainment, and commerce content. After receiving her A Levels in English Language & Literature, Art History, and Theater Studies, she began her career in marketing while living abroad in London, working with thought leaders worldwide to create articles discussing important health and business topics. Since then, she has continued to hone her craft, writing content around technology, television, marketing, law, and shopping.

With the arrival of fall, there's a breeze in the air that only a chic layer can fix. To effortlessly update your wardrobe and prepare for the changing season, Lululemon's collection of fall-ready styles has tons of trendy pieces.

But there's one style shoppers just can't get enough of: the Define Jacket. The customer-loved jacket has a flattering, slim fit and a versatile silhouette that pairs well with everyday clothes in addition to activewear. It comes in two of the brand's signature fabrics -- the buttery and weightless Nulu material and the cotton-soft Luon fabric -- in a few variations, including hooded, cropped, and oversized.

Typically priced between $118 to $148, we found a few Define Jackets hiding in the brand's We Made Too Much section starting at $99 -- and sizes are selling out fast.

You can save nearly $30 on Lululemon's Define Jacket in a diamond edition of the Define Jacket, which is just like the classic version but with a slightly raised jacquard texture that complements your curves. It has a zip-up front, thumbholes, a locker hoop for hanging, and zippered pockets made from Lululemon's lightweight, stretchy, and moisture-wicking Nulu fabric.

The classic silhouette is on sale in timeless black -- act fast because sizes are already selling out.

If a looser fit is more your style, the Lululemon Define Jacket in the relaxed fit is perfect for you, and it's $19 off. It's made from the brand's Luon material, which is lightweight, sweat-wicking, and quick-drying. Like the other Define jackets, this style has thumbholes and secure zip-up pockets, but this one also features shock cords at the hem you can cinch to adjust the shape. One shopper described it as "stylish," adding that it's "roomy enough to wear a sweater under for layering." Another enthused, "This fits great! Comfortable yet super cute."

This Lululemon jacket comes in three on-sale colors -- grey eucalyptus, blue willow, and palm court. All sizes are currently in stock, but we predict they'll sell out quickly.

The classic Define jacket comes in several shades, but this one pairs the versatile black fabric with trendy gold accents. In buttery Nulu fabric, this form-skimming style features the same design details like thumbholes, a hidden phone pocket, and an elastic zipper pull that doubles as an emergency hair tie.

Shoppers can't stop raving about how flattering this jacket is, with one writing, "It hugs my body in the right places and accentuate[s] my curves." Another agreed that it does "snatch" your figure, while one final shopper said, "I love these jackets! They are so flattering."

Add your favorite Lululemon Define Jacket to your cart to see what thousands of shoppers love about it, then keep scrolling for more options to keep you warm and stylish this season.