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Celanese and Under Armour Develop Innovative New NEOLAST™ Fiber for Use in Performance Stretch Fabrics

NEOLAST™ Fiber Offers Elevated Stretch Performance While Helping Address Sustainability Challenges Associated with Elastane

Celanese Corporation (NYSE: CE), a global specialty materials and chemical company, and Under Armour, Inc. (NYSE: UA, UAA), a global leader and innovator in athletic apparel and footwear, have collaborated to develop a new fiber for performance stretch fabrics called NEOLAST™. The innovative material will offer the apparel industry a high-performing alternative to elastane – an elastic fiber that gives apparel stretch, commonly called spandex. This new alternative could unlock the potential for end users to recycle performance stretch fabrics, a legacy aspect that has yet to be solved in the pursuit of circular manufacturing with respect to stretch fabrics.

NEOLAST™ fibers feature the powerful stretch, durability, comfort, and improved wicking expected from elite performance fabrics yet are also designed to begin addressing sustainability challenges associated with elastane, including recyclability. The fibers are produced using a proprietary solvent-free melt-extrusion process, eliminating potentially hazardous chemicals typically used to create stretch fabrics made with elastane.

NEOLAST™ fibers will be produced using recyclable elastoester polymers, a critical first step for the industry to address the challenge of recycling blended fabrics containing elastane. As end users transition to a more circular economy, Celanese and Under Armour are exploring the potential of the fibers to improve the compatibility of stretch fabrics with future recycling systems and infrastructure.

“Working with a leading global brand like Under Armour to elevate the performance and sustainability benefits of their products is just the first of many great things we hope to accomplish with this innovative NEOLAST™ technology,” said Tom Kelly, Celanese senior vice president, Engineered Materials. “Celanese is proud to bring its polymer expertise and technical know-how to help manufacture NEOLAST™ fibers for textiles and fabrics to meet the specific needs of our customers and other value chain partners. We are just beginning to unlock its potential and look forward to what’s ahead as we explore other opportunities with end users.”

“This new NEOLAST™ fiber represents a transformative innovation for Under Armour and the textile industry, embodying our commitment to building better products for our consumers and planet,” said Kyle Blakely, senior vice president of innovation at Under Armour. "Through performance-driven sustainability and innovation, we look forward to helping athletes play at the top of their game as we work with Celanese to realize this new fiber’s potential to forge a path toward circularity.”

In addition to the sustainability benefits, the new NEOLAST™ fibers deliver increased production precision, allowing spinners to dial power-stretch levels up or down and engineer fibers to meet a broader array of fabric specifications.

In addition to Celanese exploring application opportunities with Under Armour, the company intends to make the fiber available to the broader apparel industry, potentially reducing elastane dependence.

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About Celanese

Celanese Corporation is a global chemical leader in producing differentiated chemistry solutions and specialty materials used in most major industries and consumer applications. Our businesses use the full breadth of Celanese's global chemistry, technology and commercial expertise to create value for our customers, employees, shareholders and the corporation. As we partner with our customers to solve their most critical business needs, we strive to positively impact our communities and the world through The Celanese Foundation. Based in Dallas, Celanese employs approximately 13,000 employees worldwide and had 2022 net sales of $9.7 billion. For more information about Celanese Corporation and its product offerings, visit

About Under Armour

Under Armour, Inc., headquartered in Baltimore, Maryland, is a leading inventor, marketer, and distributor of branded athletic performance apparel, footwear, and accessories. Designed to empower human performance, Under Armour's innovative products and experiences are engineered to make athletes better. For further information, please visit


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