Celanese Corporation, a global specialty materials and chemical company, and Under Armour, Inc., 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.

https://about.underarmour.com/en/stories/2024/01/celanese-and-under-armour-develop-innovative-new-neolast–fiber-.html