JC London ·Dec 10, 2025

Activewear Trends 2025: What Women in London Are Wearing

Activewear has undergone a remarkable transformation. No longer reserved for the gym or a morning run, it has seamlessly integrated into our daily lives, becoming a powerful expression of a lifestyle that values wellness, performance, and impeccable style. In a fashion-forward city like London, this evolution is on full display. The streets are a runway for outfits that can handle a HIIT class, a work-from-home video call, and a weekend brunch with equal flair.

As we look towards 2025, the direction of activewear is clear: it’s becoming more sophisticated, more sustainable, and more versatile than ever. The latest activewear trends UK women are embracing reflect a desire for clothing that works as hard as they do, without compromising on aesthetics. This guide explores the key trends shaping women's activewear in London, from innovative materials to chic silhouettes, and offers a glimpse into the future of what it means to dress for an active life.

The Top Activewear Trends UK for 2025

This year is all about a "less but better" approach. Think elevated basics, luxurious textures, and multifunctional pieces that blend performance with high fashion. Here are the defining trends you’ll see in studios and on streets across London.

1. The Rise of "Quiet Luxury"

Loud logos and flashy branding are taking a backseat to understated elegance. The "quiet luxury" trend, which has dominated mainstream fashion, has firmly taken root in activewear. It’s about prioritizing impeccable quality, refined fabrics, and a perfect fit over conspicuous branding.

What it looks like: Think monochrome sets in rich, muted tones like deep navy, charcoal, chocolate brown, and creamy beige. The focus is on the silhouette and texture—leggings with a perfect seam, tops with elegant necklines, and branding that is minimal or non-existent. The luxury is communicated through the quality of the garment itself.
Why it's trending: Consumers are moving towards more considered purchases. They want investment pieces that are timeless, versatile, and will last for years, rather than chasing fleeting, logo-heavy trends. This aligns with a broader shift towards sustainability and mindful consumption.

2. Second-Skin Fabrics and the "Barely There" Feel

Comfort has reached a new level of importance. The demand is for fabrics that feel like a second skin—buttery-soft, weightless, and completely non-restrictive. This trend is less about high compression and more about a gentle, supportive embrace that allows for total freedom of movement.

Spotlight on JC London Second Skin Leggings: A brand that perfectly embodies this trend is JC London. Their second skin leggings have become a cult favorite for their incredibly soft, peached fabric that offers a "barely there" sensation. They are engineered to provide a light, comfortable hug that smooths and supports without ever feeling tight. Paired with a no-roll high waistband and a seamless front, they offer a flawless fit for Pilates, yoga, or all-day wear. This is the kind of foundational piece the quiet luxury trend is built on.
Why it's trending: The line between activewear and loungewear has completely blurred. People want leggings they can wear for a workout and then comfortably keep on for the rest of the day. The second-skin feel delivers this all-day comfort.

3. Textured and Ribbed Fabrics

Texture is adding a new dimension to activewear in 2025. Smooth, flat fabrics are being joined by ribbed, waffled, and subtly textured materials that add visual interest and a tactile, luxurious feel.

What it looks like: Coordinated sets of ribbed leggings and bra tops are a dominant look. This isn't the chunky ribbing of the past, but a fine, elegant rib that sculpts the body and elevates the look of a simple set. This trend is seen across leggings, tanks, sports bras, and even workout onesies.
Why it's trending: Texture makes a simple monochrome outfit feel more intentional and fashion-forward. It adds a layer of sophistication and depth, turning a basic workout set into a statement.

4. The Bodysuit and Unitard Comeback

The one-piece is officially a mainstream activewear staple. Bodysuits (torso only) and unitards (full-body) offer a sleek, streamlined solution that eliminates any fuss with adjusting clothes during a workout.

What it looks like: 2025's unitards are sophisticated and stylish, featuring elegant details like open-back designs, flattering square necklines, and built-in shelf bras for light support. They come in both full-length and shorts (romper) styles. Bodysuits are being paired with leggings for a seamless, tucked-in look.
Why it's trending: Functionality is the main driver. With a one-piece, your top will never ride up in downward dog, and your waistband won't roll down during squats. It's the ultimate in secure, distraction-free performance wear.

5. Sustainable and Eco-Conscious Materials

Sustainability is no longer a niche concern; it's a core expectation. One of the most significant activewear trends UK consumers are driving is the demand for eco-friendly options.

What it looks like: Brands are using recycled materials, such as nylon and polyester made from post-consumer waste like plastic bottles. There's also a growing use of innovative plant-based fabrics, like Tencel™ (from eucalyptus trees) and Modal, which are known for their softness and lower environmental impact.
Why it's trending: The modern consumer is more informed and environmentally conscious than ever. They want to support brands that align with their values, and that means choosing apparel that is not only high-performance but also kind to the planet.

Q&A: Navigating the 2025 Activewear Trends

Making trends work for you can be a challenge. Here are answers to some common questions.

Q: How can I incorporate these trends without replacing my entire wardrobe?

A: The key is to be selective and focus on versatile pieces.

Start with a Hero Piece: Invest in one high-quality item that embodies a key trend, like a pair of JC London second skin leggings. Their timeless design and superior comfort will instantly elevate your existing workout tops.
Focus on Texture: Add a single ribbed tank or bra top to your collection. You can pair it with leggings you already own to instantly tap into the texture trend.
Play with Color: If your wardrobe is full of black, try adding a set in a new-neutral shade like chocolate brown or olive green. It's a simple way to feel current without changing silhouettes.

Q: Are sustainable activewear options really worth the higher price?

A: Yes, for several reasons. While the initial cost may be higher, the value is significant.

Durability: Eco-conscious brands tend to focus on quality and longevity. Their products are often better made and last longer, reducing the need for frequent replacements. This "buy less, buy better" approach is more economical and sustainable in the long run.
Performance: Recycled synthetics have come a long way. They now offer the same level of performance—stretch, sweat-wicking, durability—as their virgin counterparts.
Ethical Impact: The price often reflects ethical production practices and a commitment to reducing environmental harm. By investing in these brands, you are supporting a healthier planet and fairer labor practices.

Q: How can I make my activewear last longer?

A: Proper care is crucial, especially for high-performance and sustainable fabrics.

Wash Cold, Gentle Cycle: Hot water degrades synthetic fibers like elastane, destroying the stretch and fit.
Avoid Fabric Softener: It leaves a residue that can impair the fabric's moisture-wicking properties.
Wash with Like Items: Don't wash your soft leggings with abrasive items like jeans or towels with zippers. Use a garment bag for extra protection.
Always Air Dry: This is the golden rule. The heat from a tumble dryer is the number one enemy of activewear, as it can shrink garments and ruin elasticity.

Conclusion: Dress for the Life You Live

The activewear trends UK women are adopting in 2025 are a clear reflection of a modern, multifaceted lifestyle. It’s about more than just fitness; it’s about feeling comfortable, confident, and stylish in every scenario. The shift towards quiet luxury, second-skin comfort, and sustainability shows a collective desire for pieces that are not only beautiful and high-performing but also thoughtful and enduring.

As you explore these trends, remember that the best activewear is the kind that makes you feel good. Whether you’re drawn to the sleek silhouette of a unitard or the unmatched comfort of JC London leggings, choose pieces that support your activities and resonate with your personal style. This year, your workout wardrobe is designed to empower you, both in and out of the studio.