Which fabric is NOT considered a core fabric at Lululemon?

Denim is not regarded as a core fabric at Lululemon, which primarily focuses on performance-oriented materials designed for athletic wear and active lifestyles. Core fabrics like Luon, Nulu, and Warpstream are specifically engineered for qualities such as stretch, breathability, and moisture-wicking, enhancing the performance and comfort of the garments.

Luon is known for its blend of cotton and Lycra, providing a soft feel with good stretch recovery, making it ideal for yoga and other fitness activities. Nulu is recognized for its ultra-soft, lightweight qualities, perfect for everyday wear and yoga practices. Warpstream is engineered for added durability and flexibility, making it suitable for various movements. In contrast, denim, while versatile and popular in casual clothing, does not meet the specialized needs of athletic apparel that Lululemon emphasizes in its core offerings.