Lululemon’s Align leggings use Nulu fabric.
Nulu is lululemon’s lightweight, buttery-soft fabric developed for its “Naked Sensation” category. The company describes it as a super-fine nylon knit with Lycra added for stretch. Its design priority is a barely-there feel for yoga and other low-impact activities rather than firm compression or maximum sweat management.
The fabric names are easy to confuse because lululemon uses several similarly branded technical textiles. Nulux is also lightweight, but is intended for higher-impact workouts and is sweat-wicking and quick-drying. Everlux uses a double-knit construction for sweaty studio sessions, while Luxtreme is a smooth, sweat-focused fabric commonly associated with running and training.
Align became one of lululemon’s signature franchises after launching in 2015. Its popularity comes from combining Nulu’s unusually soft hand-feel with a high-rise, minimalist design that allows extensive movement. That comfort also explains why Align leggings are often recommended for yoga, lounging, travel, and everyday wear rather than demanding, high-friction exercise.