Unless you've been living under a fashion rock, you'll know that side-striped trousers are *everywhere* right now. It's all thanks to Adidas, of course, who are leading the track pants trend for the second year in a row – and just in time for summer.

Approved by everyone from Zoë Kravitz to Hailey Bieber and Alexa Chung, the Firebirds are cool-girl coded. And, with each famous face wearing them in ways that suit their own individual styles, the bottoms have gone from purely athleisure to acceptable in any social setting. Seriously, people are rocking up to the office in side-striped trousers and oversized blazers, complete with an iced coffee in hand.

Driven by a ‘90s-inspired football aesthetic, they put the cool in casual and offer a fun, comfy alternative to jeans. While denim will always be a timeless classic, there are only so many times you can alternate your low-rise jeans before they become a part of your personality.

frankfurt am main, germany april 21: julia kammerer is seen wearing a light blue short sleeved „cali“ t shirt with burgundy polka dots, three white stripes on the shoulders and white trefoil logo at the chest from adidas originals; light blue satin wide leg track pants with burgundy polka dots and three white side stripes from adidas originals; a large burgundy braided faux leather shoulder bag with a curved hobo silhouette from nakd; a brown leather dachshund dog shaped bag charm with gold tone hardware from stradivarius; tortoiseshell acetate aviator sunglasses with blue tinted lenses from vehla; a burgundy jersey headband from hm; carrying a macbook from apple; a pale pink manicure; several chunky jewelry pieces in gold and silver including bracelets, rings, necklaces and hoop earrings from pandora, akind, other stories, hm, my jewellery or scandiv; her blonde hair is styled in a straight long bob; with a natural make up look on april 21, 2026 in frankfurt am main, germany. (photo by moritz scholz/getty images)pinterest
Moritz Scholz//Getty Images

Naturally, the look has spread across the high street with all our favourite retailers offering their own take on the trend. Right now, brightly coloured track pants are coming in strong, with matcha green, cobalt, and pink being the shades of the summer.

When it comes to how to style yours, side stripe trousers really have no limits. Sure, nothing is stopping you from channelling your inner Sporty Spice, but don't be afraid to dress things up for everyday wear. Our personal favourite pairings include a tailored blazer, or an oversized tee with an optional knitted tank layered over the top. Fitted waistcoats with trainers also look super cute, while cashmere cardigans give that quiet luxury edge.

frankfurt am main, germany april 21: julia kammerer (l) is seen wearing a mint green tie front blouse from other stories; yellow trousers from myjewelry; leopard print flat slide sandals from pullbear; red nail polish manicure; a large chocolate brown smooth leather calla tote bag with a structured folded silhouette from charles keith; two light blue resin bangles from other stories; a pale pink manicure; several chunky jewelry pieces in gold and silver including bracelets and rings from pandora, akind, other stories, hm, my jewellery or scandiv; yvonne schuppler kammerer (r) is seen holding a dark brown leather blazer from stradivarius; wearing an oversized white button down shirt from zara; pale yellow wide leg track trousers with black three stripe detail from adidas; black pointed toe slingback pumps from hm; a dark brown ff monogram canvas fendi zucchino half moon baguette bag from fendi; a grace gold wristwatch from kapten son; multiple gold rings from hm and scandivv; a nude manicure on april 21, 2026 in frankfurt am main, germany. (photo by moritz scholz/getty images)pinterest
Moritz Scholz//Getty Images

Want to shop the look? Marks & Spencer has recently released these ultra-cool cotton-rich retro side stripe joggers that come in either black or white. The former has khaki and white stripes down each leg, while the white pair has pink and red to provide a colour pop without forcing you too far outside of your neutral comfort zone. Coming in at just £36, and available in sizes 6 through to 24, you can also get them in different leg lengths, including extra short, petite, regular and long. Sounds like a bargain to us!

Alongside this M&S offering, take a look at some of our other fave side stripe trousers from high street stores, available to shop now:

Cotton Rich Retro Side Stripe Joggers

Cotton Rich Retro Side Stripe Joggers

Cotton Rich Retro Side Stripe Joggers

Credit: M&S

adidas Originals Firebird loose track pants in green and yellow

adidas Originals Firebird loose track pants in green and yellow

adidas Originals Firebird loose track pants in green and yellow

Credit: ASOS

Tailored scuba trousers

Tailored scuba trousers

Tailored scuba trousers

Credit: H&M

Wide-leg plush trousers with trim detail

Wide-leg plush trousers with trim detail

Wide-leg plush trousers with trim detail

Credit: Stradivarius
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Sophie Williams
Freelance Journalist and Copywriter

Sophie Williams is a Freelance Journalist and Copywriter, covering everything from Fashion to Entertainment to music, Lifestyle and Features. She has interviewed a range of musical artists and authors including Alyssa Edwards, Courtney Barnett, Confidence Man, The Vaccines, Loyle Carner, Gabrielle, and John Niven, and has written for publications like Metro, Reader's Digest, ITV's Woo! and Vice’s NBGA. She is also working on a book for HarperCollins about Taylor Swift, due to be published in 2024.