Where to Buy the Best Gym Wear in 2026

TELLAR FASHION HUB — STYLE ADVICE

By Ella Blake — Tellar Head Stylist

The best gym wear in 2026 comes from a surprisingly wide range of retailers — from dedicated activewear brands like Sweaty Betty and Gymshark to high street stalwarts like M&S and H&M who have quietly built brilliant sports ranges at a fraction of the price. Whether you're after squat-proof leggings, a decent sports bra, or kit that looks polished enough to wear from studio to street, there genuinely has never been more choice — which, honestly, makes shopping for it both exciting and completely overwhelming.

I'll hold my hand up: I've wasted money on gym kit that sounded good online and fell apart within three washes. I've also stumbled across a £22 pair of leggings from a brand I'd never heard of that became my absolute desert island piece. So I've done the legwork, tested the market, and I'm cutting straight through the noise for you.

What Actually Makes Good Gym Wear?

Before we talk brands, it's worth knowing what you're actually looking for — because “activewear” covers an enormous range of quality. Here's what I always check:

• Fabric quality & compression: You want four-way stretch with good recovery — meaning it bounces back after every squat and wash. Cheap fabric sags after a few wears.

• Squat-proof opacity: Non-negotiable. Hold the fabric up to the light before buying, or check independent reviews.

• Moisture-wicking technology: Keeps you dry and prevents chafing. Look for nylon-spandex or polyester-elastane blends.

• Sports bra support level: Low (yoga/pilates), medium (cycling/Barre), or high (running/HIIT). Getting this wrong is a rookie error I made for years.

• Comfort at the waistband: A rolling or digging waistband will derail an entire workout. Wide, flat waistbands are your friend.

The Best High Street Options for Gym Wear

You absolutely do not need to spend a fortune to get great gym wear — and these high street brands prove it.

• Gymshark — The brand that basically built itself on social media, and for very good reason. Their Vital Seamless and Flex leggings are consistently well-reviewed for squat-proof coverage and a flattering fit. Great for everything from lifting to spin.

• ASOS — Brilliant for budget gym wear, and their own-brand 4505 activewear line is genuinely impressive for the price point. Worth checking the individual product reviews though — quality varies more than at dedicated sportswear brands.

• H&M — Their Move collection is seriously underrated. Technical fabrics, stylish cuts, and prices that won't make you wince. I've recommended their seamless sets to clients on a budget and they're always pleasantly surprised.

• M&S — Especially good for sports bras. The Good Move range has cracked high-impact support at an accessible price, and their medium-support bralettes are some of the most comfortable I've worn. Also brilliant for longer lengths if you're tall.

• Abercrombie & Fitch — Their YPB (Your Personal Best) activewear line has been racking up serious praise across fitness communities. Great ribbed textures and fit, particularly for yoga and lower-impact training.

• Calvin Klein — Their Performance range is sleek, minimal and enduringly stylish. Perfect if you want kit that looks polished whether you're at the gym or running errands straight after.

• Superdry — Often overlooked for gym wear, but their Sport collection has some excellent technical pieces, particularly for outdoor training and running. Good for layering in cooler weather too.

Premium Gym Wear Worth the Investment

When you're ready to invest a bit more, these two brands are where I'd point you every time.

• Sweaty Betty — The UK's own premium activewear queen, and still one of the best. Their Power Leggings are genuinely legendary — flattering, supportive, and built to last years rather than months. If you're going to splurge on one thing, make it a pair of Sweaty Betty leggings.

• Lululemon — Yes, the price tag is real. Yes, they're worth it. The Align leggings are still the benchmark for buttery-soft comfort, and their sports bras offer exceptional support across all impact levels. A quality piece from Lululemon is a cost-per-wear win.

Two Independent Brands You Should Know About

I always like to shout about brands flying under the radar — because some of the best gym wear on the market isn't from the big names.

• Tala — A UK-founded, sustainability-led activewear brand that has been quietly impressing the fitness community for a few years now. Their leggings are made from recycled materials, fit beautifully, and the sculpting waistbands are genuinely brilliant. Bonus: Grace Beverley (founder) built the brand on real testing, not just aesthetics.

• Girlfriend Collective — Made from recycled plastic bottles and fishing nets, their Compresso leggings offer incredible compression and come in an impressive size range (XXS–6XL). Soft, squat-proof, and genuinely inclusive — this brand walks the walk.

Gym Wear for Different Workouts: A Quick Guide

• Yoga & Pilates: Prioritise softness and flexibility over compression. Lululemon Align, Abercrombie YPB, or Tala.

• Running: Look for moisture-wicking, chafe-resistant fabrics and a secure waistband. Sweaty Betty, Gymshark or Superdry Sport.

• HIIT & Weight Training: You need compression and squat-proof opacity. Gymshark Vital Seamless, Sweaty Betty Power, or Girlfriend Collective Compresso.

• Barre & Dance: Go for fitted but flexible pieces. H&M Move seamless sets, ASOS 4505, or Tala.

• On a Budget: H&M Move, M&S Good Move, and ASOS 4505 are your best friends. All punch well above their price point.

My Honest Verdict

If I were shopping for gym wear today from scratch, I'd pick up a couple of pieces from H&M Move or M&S Good Move for everyday training, invest in one pair of Sweaty Betty leggings for when it counts, and add a sports bra from Gymshark or Lululemon depending on impact level. Then I'd go rogue and add something from Tala or Girlfriend Collective because independent brands deserve the love — and honestly, they often outperform the big guns.

The golden rule? Always read real reviews before buying. Fabric opacity, waistband comfort, and sizing consistency are the things that trip people up most, and no brand photograph will tell you that.

Never Get the Wrong Size Again — Try Tellar

One thing that makes gym wear shopping extra tricky is that sizing is all over the place. A medium in Gymshark is very different from a medium in Lululemon — and getting it wrong means waiting for a return while your motivation quietly disappears. That's exactly where Tellar.co.uk comes in.

Tellar is the UK's leading free sizing tool — it matches your exact measurements to over 1,500 brands instantly, so you can shop with confidence and stop second-guessing your size. No downloads, no paywalls, no nonsense. Here's how it works:

• Measure once using your bust, waist and hip measurements (or your existing brand size as a starting point).

• Use the Tellar Store Size Lookup tool to get your precise size across any brand — from Sweaty Betty to Gymshark to Lululemon and hundreds more.

• It's always free, works directly in-browser, and takes about 60 seconds.

And when you're not hunting for your perfect legging fit, Tellar's Fashion Hub is worth bookmarking — a library of free, honest, unsponsored style advice written by real stylists. No affiliate agenda, no brand deals influencing what we say. Just straight-talking fashion advice you can actually trust.

Dive in here:

• The Ultimate Clothing Sizing Guide — everything you need to know about sizing across brands

• The Best Jean Trends for 2025 & 2026

• The Ultimate Guide to Dresses & Best Buys

• The Ultimate Guide to Jackets & Best Buys