lululemon define jacket in: 

Luon™ fabric; has a feel-good fit that can do it all. 

Velour fabric; Plush, Soft, Four-way stretch, Added Lycra® fibre for stretch and shape retention *slim fit, you might consider going up a size in the velour. Thumbholes and Cuffins™ keep sleeves down and chills out Secure front pockets. Body: 87% Nylon, 13% Lycra® elastane Lining: 89% Nylon, 11% Elastane Women's fit.

Nulu fabric; is a slim-fitting, hip-length jacket known for its incredibly soft, weightless, and four-way stretch feel, similar to Lululemon Align leggings. Designed for casual wear and to and from workouts, it includes features like thumbholes, zippered pockets, and a zipper pull that doubles as an emergency hair tie.