NewsPhotosVideosShoppingVMAsKardashiansCouplesInfluencersRed CarpetRoyalsTV Scoop

The Viral Define Jacket Dupe Is 50% off for Prime Day: Shop 10 More Just Like It Under $30

Shoppers can’t get enough of the iconic activewear jacket for summer, shop the best-reviewed dupes on Amazon. 

By Savannah Sitton Jun 23, 2026 8:40 PM
| Updated Jun 23, 2026 10:15 PM
Tags
DealsTrendsShoppingE! Insider ShopShop SalesE! InsiderAmazon Prime DaySummer FashionAmazon Prime Day 2026
The Viral Define Jacket Dupe is Half-Off for Prime DayE! Illustration

For savvy shoppers, there's nothing quite as satisfying as finding a deal so good it feels illegal - and that's exactly what's happening on Amazon right now during Prime Day 2026.

Our editors are always keeping tabs on what's trending in celebrity street style, and A-listers always love activewear, but lately, stars are especially loving slim-fitted athletic jackets for the summer season. These dupes from Amazon nail the trend, but at a fraction of the price. 

If you're not on social media, the term "BBL jacket" may be new in your vocabulary. The athleisure trend entails an athletic jacket with a slim-fit cut (creating a "BBL" hourglass effect), zip-up front and handy details like zippered pockets and thumb hole sleeves, crafted of lightweight, breathable fabrics that are ideal for summer. The outcome is a super sleek, streamlined look that can be worn to the gym or while running errands just as well. 

Shoppers have been raving about these jackets for months now, so, at this point, there's plenty of options in a range of colors, sizes and styles to choose from.

Considering celebrities love an activewear look, here's our favorite picks from the celeb-approved trend, even Lizzo's brand Yitty has its own rendition – no one will know it was less than $30 on Amazon. 

Yitty Active Women's Ultraluxe Full Zip Jacket

This performance jacket flatters every figure and is perfect for layering with your favorite workout clothes. Choose from several colors.

Magcomsen UPF 50+ Lightweight Athletic Jacket

Shoppers can't stop raving about how lightweight and breathable this 40% off pick feels, plus it's UPF fabric meaning it'll shielf you from the sun, making it ideal for summer sweat sessions, but flattering enough to wear to lunch afterwards too.  

Aurvae Full Zip Lightweight Slim Fit Athletic Jacket

A cropped option that's earned a loyal following for its figure-flattering fit and soft, stretchy material that feels just as good as it looks. 

read
Working on Your Sleep & Fitness? The Oura Ring Gen 4 Is Now 20% Off 

90 Degree By Reflex Full Zip Running Track Jacket

Depending on preference, the Define jacket typically comes in regular and cropped lengths. This dupe features the coveted cropped shape without sacrificing functionality, staying perfectly in place all workout long, says reviews. 

Gym Rainbow Athletic Workout Jacket

This one's a shopper favorite for its versatility–it's lightweight enough for workouts, but polished enough to wear while running errands without looking like you just left the gym, even if you did. 

Vutru Full Zip Running Athletic Track Jacket

This one's a shopper favorite for its versatility–it's lightweight enough for workouts, but polished enough to wear while running errands without looking like you just left the gym, even if you did. 

Avgo Cropped Slim Fit Gym Jacket

Depending on preference, the Define jacket typically comes in regular and cropped lengths. This dupe features the coveted cropped shape without sacrificing functionality, staying perfectly in place all workout long, says reviews. 

Bosmeer Store Workout Jackets for Women Lightweight Zip Up

This bestselling style perfectly embodies the trend's slim, zip-up silhouette and is now 25% off. Shoppers call it "the perfect dupe for expensive brands."

Shopping for skincare deals this Prime Day? Here's The Best Amazon Prime Day Skincare Deals for Dewy, Hydrated Summer Skin Starting at $16 

How We Choose

The E! Insider Shop editors and writers search the internet to find the best products out there. We interview expert sources, comb through customer reviews, and use our own personal experiences to make shopping easier for our readers.

As an editorial team, we independently create content and determine coverage based on research, reporting and what we think our readers would like to read about. The goal of our content is to provide a service and inform readers who are on the hunt for the latest products to help make their life better. Items are sold by retailer, not E!. Pricing and availability are accurate as of publish time.