Toray Primeflex™: The Stretchy, Lightweight Performance Fabric

Modern outdoor and activewear gear needs to be able to do it all: stretch with your movements, protect you from the elements, be durable, and feel soft against your skin – preferably all while keeping an eye on sustainability.

Say hello to Primeflex™ by Toray, a lesser known but still very much cutting-edge fabric that checks all the boxes when it comes to performance fabrics. In this article I’m going to explain what it is, how it works, the benefits of performance apparel that uses it, and finally I’ll share some noteworthy gear that I have recently reviewed that utilises it.

What is Primeflex™?

Primeflex is a bi-component fabri, meaning it blends two distinct fibers into a single yarn, creating a material that’s incredibly stretchy, strong, and soft. This construction not only ensures flexibility and comfort but also adds durability, so your gear moves with you and stays strong.

Primeflex’s partial plant-based composition brings sustainability into the mix, reflecting a commitment to reducing environmental impact without compromising on performance.

Its adaptability makes it a versatile choice for everything from athletic pursuits to everyday wear, giving you confidence and comfort, no matter the activity.

The benefits of PrimaLoft for outer layer apparel

Unrestricted movement

Primeflex stretches in a mechanical manner, rather than stretching in the traditional sense, like Spandex for example – this also makes it more lightweight.

This makes it ideal for activities requiring freedom of movement, like climbing, yoga, or even long hikes where lightweight apparel is required or prefered. Unlike traditional stretch fabrics that can lose their elasticity over time, Primeflex maintains its shape and performance.

Soft feel

Comfort is another priority with Primeflex. Its smooth, soft texture feels great against the skin, making it equally suited for high-performance gear and casual, everyday pieces. This softness is something that really stood out to me when reviewing shells and shorts using this fabric.

Sustainability focus

Because it’s partially plant-based (sourced from corn), Primeflex reflects the growing demand for sustainable materials in outdoor gear.

Primeflex™ gear worth trying

Ready to see Primeflex in action? Here are a couple of outdoor and activewear items that showcase the versatility of this innovative fabric:

• Path Projects Graves PX Shell Jacket: This jacket combines water resistance, breathability, and stretch in a lightweight, versatile design perfect for running and daily wear, with thoughtful storage and eco-friendly fabric. To learn more, read my Graves PX Shell Jacket review.
• Path Projects Graves PX Shorts: Lightweight, durable, unlined running shorts with zippered pockets, available in multiple inseam lengths. Designed for versatility, they pair perfectly with PATH’s base liners. Learn more in my best running shorts for men roundup.

Have you tried gear made with Primeflex™ yet – what do you think of it? Share your experiences in the comments below! For more gear reviews, insights, and outdoor tips, subscribe to my newsletter and join the conversation.