Why Knitwear Is the Future of Performance Fashion

PH5 activewear serves up a fresh take on performance and style, blending technical innovation with the brand's signature whimsical aesthetic. Made with zero-waste knitting and recycled yarns it is our most sustainable activewear to date. Road-tested by our Ironman athlete founder Wei, these pieces are moisture-wicking and designed to work with the body for optimum performance. Our newest collection of gym & tennis wear is designed to move effortlessly from the court to the everyday. As seen on Vogue.com

 

Through technical knitting it is possible to tailor different compression needs according to different muscle types. 

PH5's activewear blends technical precision with seamless design. Bra tops feature a curved shape with high-compression knitting in the front for support and a more flexible knit in the back for comfort. Leggings use a lighter, stretchier yarn than the tops, with targeted compression—firmer in the front for support and more flexible in the back for mobility. This level of innovation is made possible through advanced knitting technology.

PH5 activewear is for the active person taking them from the studio to brunch to summer festivals in style & comfort.

 

“The whole process felt like I was designing my ideal sporty suit of armor. My intention was to specifically test our products under extreme conditions to make sure they hold up and that they are comfortable to wear from beginning to end. And they are!” 

Our founder Wei Lin, Ironman athlete

FAQ

Why choose PH5 activewear?

PH5 activewear sits at the intersection of high-fashion knitwear and performance design. Our pieces deliver something rare: technical performance, sustainability, and fashion credibility in one piece. PH5 activewear is for those who want sculpting, breathable, design-forward activewear that stands out, whether you're training, traveling, festival-ing or simply getting dressed.

Can I actually work out in PH5 activewear?

Yes, that's what we made it for. PH5 activewear is designed for versatility across movement and lifestyle. Our compression knit leggings and tops support activities like running, strength training, and HIIT, while our bras are best suited for low-impact workouts such as yoga and pilates (especially for fuller busts). Think performance meets polished athleisure.

How does PH5 activewear fit and feel?

Expect a sculpted, body-contouring fit with surprising comfort in a true-to-size fit. PH5 activewear is designed to feel compressive yet flexible, adapting to your shape while maintaining structure. The knit construction offers breathability and stretch, making pieces feel supportive but never restrictive. Check out our Size Chart for more details.

Is PH5 activewear only for workouts?

Not at all. PH5 is designed for real life. From studio to street to travel days, our pieces transition effortlessly into everyday wardrobes. Customers frequently wear PH5 at festivals like Coachella, on vacation, or styled as statement athleisure, because performance doesn’t have to look basic.

Is PH5 activewear sustainable?

Sustainability is built into every PH5 garment. PH5 pieces are made from high-performance recycled yarns (92.6% recycled nylon, 7.4% recycled spandex) chosen for its softness, stretch, and durability. Our signature zero-waste knitting process minimizes excess material, creating a more sustainable, future-focused approach to activewear production. Any production excess is re-spun into new yarn, reducing waste and extending the lifecycle of our materials, without compromising on quality or design.

How do I care for PH5 activewear?

To maintain the integrity of the knit and performance features, wash cold on a gentle cycle and air dry. Avoid extreme heat and harsh detergents to preserve stretch, color, and shape over time.