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Looking for more sustainable and size-inclusive activewear? Our round-up features “Good” and “Great”-rated brands making clothes in sizes up to 6XL.
Meet the brands making size-inclusive activewear
There’s so much to consider when you’re investing in activewear—how it’ll move with your body, whether it’s cooling enough, and whether it’ll still feel comfortable when you’re halfway through a HIIT session. Throw sustainability and size inclusivity into the mix and it can feel like your options quickly diminish, but we’re here to show you that’s not the case. In 2025, theree are brilliant activewear brands making more sustainable sports bras, leggings, tops, sweatpants, and more in size ranges through to 6XL. Scroll on to see our selection, plus a few tips on what to look for when you’re shopping.
What to consider when buying more ethical activewear and gym clothes
- If you’re not sure what you’ll need, then know that a quality pair of sneakers, a sports bra, loose top, and leggings or sweatpants are good starting points for most types of exercise.
- Consider how much support you’ll need and want, particularly when it comes to sports bras and compression items.
- Test out your range of movement with a few light stretches when you first try activewear items on—whether in-store or when you receive them at home—to make sure you’re going to feel confident when working out in them.
- One of the biggest sustainability issues in activewear is the use of synthetic materials and chemical finishes that deliver water resistance, since these are harmful to the environment. Opt for plant-based and organic materials instead, or if you do choose synthetics, go for recycled ones.
- Secondhand retailers often have a good range of activewear available, which helps divert items from landfill and is often cheaper than buying new.
A note on size inclusivity
Good On You wants to help you find more sustainable options that suit your needs. We share your frustration that sustainable fashion has too few size-inclusive options. More sustainable brands often lack an extended sizing range beyond 2XL, and when they do, they might provide limited options and a lack of imagery demonstrating how those products look on a range of sizes. In order for sustainable fashion to become more mainstream, it has to include everyone, and brands need to catch up or risk getting left behind. Until then, ethical brands offering custom sizing are a good option. Dipping into brands rated “It’s a Start” if they best meet your needs also works. Discover more about the importance of size inclusivity in fashion.
Why you can trust our recommendations
At Good On You, we provide trustworthy recommendations that align with your values and needs. Our mission is to simplify informed choices while embracing the “buy less, buy better” motto.
To ensure credibility, we aggregate comprehensive, transparent information on fashion sustainability—assessing brands using our leading methodology, developed by diverse experts. Our ratings directory of over 6,000 brands employs a simple five-point scale, curating a list of “Good” or “Great” brands making significant contributions to sustainable fashion.
Our editorial team, driven by expertise and passion, carefully reviews and approves each recommendation, upholding high standards of quality, longevity, and trend-transcendence.
While we recognise the value of reusing, mending, and second-hand shopping, our expert ratings system guides you toward new brands aligned with your values and sustainability goals.
