Your Favorite Pilates Girl Wears These Workout Sets: 8 Cool Activewear Brands to Know for Your Next Class

I'm on a new fitness journey, and I've found that a cute workout set is a big motivator for me. This set me off on a massive shopping spree to find the cutest workout sets available. And since fall has snuck up on us (and celebs everywhere are bringing back the flared leggings and class-to-errand outfits), I've rounded up eight of the coolest activewear brands.

So if you're going to wear leggings in fall 2025, make them from one of these brands. Shop the best workout sets, the best flared leggings, and the best activewear brands backed by celebs and fashion people below.

Adanola

Kendall Jenner posted on IG in the khaki Adanola Ultimate Leggings last month, and already the fall-ready finish has become a fashion insider favorite. But the deep khaki isn't the only non-black shade to rise in popularity this fall. Celebs are also backing beige, chocolate brown, and heather gray. Follow Kendall's lead and pick up a pair of the best-selling leggings to experience the buttery-soft fabric.

Vuori

California brand Vuori is known for its AllTheFeels Collection, which crafts quality active and daily wear built to move with you. Its BlissBlend fabric is ultra-soft, moisture-wicking, and above all, flexible. Vuori also collaborated with Kaia Gerber for its fall 2025 capsule collection, Vuori by Kaia.

ALO

It comes as no surprise that ALO has made this list. The brand has been spotted on celebs from Hailey Bieber to Elsa Hosk and holds its status for good reason. It's praised for its studio-to-street ability, and the high-quality activewear can easily go from 7 a.m. sculpt class to brunch with friends. Curious what to wear with leggings? Try a matching set for a sleek, put-together look. Some of my favorite leggings outfits start with an ALO set.

Outdoor Voices

If you haven't heard of Outdoor Voices before, I highly recommend checking it out. It's activewear designed to prioritize joy and movement. Outdoor Voices supplies technical apparel for many recreational activities, including hiking, equestrian, and court wear. The brand is not afraid of color or prints, and breaks free from the minimalist, neutral palette of other activewear brands and opts for a playful, energetic feel.

Set Active

Designed to mix and match, the brand's harmonious color palette and classic silhouettes are perfect for building your dream activewear wardrobe. Set Active is built around cute sets and delivers dependable, breathable comfort. It's ranked on our list of best activewear brands of 2025. Set Active is expertly balanced between workout wear and loungewear.

437

437 does chic onesies so well. From its original design to its Sculpt version, the fitted garment hugs and lifts in just the right places. The trendy brand brings a playful, cutsey approach to activewear. It's a Pilates girl must-have.

FP Movement

Free People's FP Movement offers stylish activewear and everyday basics, from chic workout sets to standout leggings. The designs are cute, functional, and true to the Free People aesthetic.

Monday Body

Monday Swim is an editor-favorite for poolside bikinis, while Monday Body is a Pilates girl's dream. Each legging, romper, short, and tank is designed to move with you. From running errands to catching a spin class, Monday Body's double waistbands and thick shoulder strap designs are there to support you through your day.