Stio, the mountain lifestyle brand headquartered in Jackson Hole, WY, reported its commitment to removing per- and polyfluorinated chemicals (PFAS) from its technical apparel, footwear and accessories line. 

With the launch of Stio’s FW 2023/24 collection, the brand is progressing towards its goal, with more than half of the line made without PFAS. Stio said it “plans to completely transition away from using the chemicals by the launch of the following winter season in 2024/25.”

Stio adopted several newly developed technologies to meet its goal while maintaining product performance and durability standards. One of the more significant efforts was “transitioning from C6 to C0 DWR treatments in all of its outerwear and apparel, removing fluorocarbons (PFAS) from the formula and replacing them with less harmful ingredients, including silicone.” Upgraded styles with the new PFAS-free DWR treatments include Stio’s Environ, Hometown and Pinion Down programs and Figment Freeride Collection.

Stio also partnered with Gore-Tex to update its Doublecharge Insulated program with ePE membrane for the upcoming winter season, providing waterproof and windproof protection in a lightweight, breathable package that excludes the use of PFAS.

“As a brand rooted in our role as caretakers of the mountain life, sustainability is a driving force behind so many of the decisions we make at Stio. Our commitment to building our preferred materials program has led to years of research and testing in order to remove these harmful chemicals without having to sacrifice performance or durability,” said Sandy Flint, senior materials manager at Stio. “While this will be an ongoing effort for the brand, we are proud to now offer solutions without the use of PFAS and are excited to see what new technologies and textiles emerge within the industry in the years to come.”

By removing PFAS from the collection, Stio said it “expands upon its commitment to the brand’s overall preferred materials adoption, which encompasses using more recycled, responsibly sourced and organic materials in its product line. In 2022, the brand increased the number of apparel styles within its preferred materials program from 82 to 125.” The brand is also working to grow its circular commerce platform, Stio Second Turn, to promote sustainability and mitigate waste and pollution.

Stio has been a climate-neutral-certified company since 2020.