Legging Fabrics, Explained: Nulu to Powervita

Legging shopping looks like brand shopping, but it’s really fabric shopping. The name on the waistband matters less than the knit it’s cut from, because the fabric decides how a pair feels, what it survives, and how it fails. Learn six names and every product page in the category starts making sense.

The buttery family

These prioritize softness over structure, and they all share one weakness: friction.

• Nulu is lululemon’s softest knit, the Align fabric, weightless and smooth. It’s the category benchmark for feel and the most delicate thing here, which is why our Align verdict keeps it out of the gym.
• Spacedye is Beyond Yoga’s brushed, marled knit, cozier and slightly heavier than Nulu. Same softness-first mission, same gentle-care rules. We covered who it suits in is Beyond Yoga worth it.
• The dupes’ butteries, Quince’s Ultra-Form and Old Navy’s soft nylon blends, chase the Nulu feel at a fraction of the price and generally run slightly sturdier, the quiet advantage of the best dupes.

The support family

• Powervita, Athleta’s signature, is buttery with substance. Owners describe being held in rather than wearing nothing, and it takes real workouts better than anything in the first family. It anchors the fit case we made in Lululemon vs. Athleta.
• Luxtreme is lululemon’s slick, cool-to-touch compression fabric, built for sweat and speed rather than softness.

The sweat family

• Everlux is lululemon’s training fabric, which the brand positions as its fastest-drying knit, made for hot classes and cardio. Sturdier than Nulu by design, it’s the fabric people should usually buy when they say they want Aligns “for the gym.”

The rule that simplifies everything

Buy buttery for low-sweat life: yoga, travel, errands, lounging. Buy support or sweat fabrics for training. Most legging regret, from pilled Aligns to clammy cheap pairs, comes from crossing those streams. Price doesn’t change the physics, it only changes how much the mistake costs.

One more variable is care. Every fabric here lives longer with cold washing and air drying, and the soft family demands it. The washing guide has the full routine.

Frequently asked

What fabric are Lululemon Aligns made of?

Nulu, a soft nylon and Lycra knit that is lululemon’s signature buttery fabric. It is built for feel rather than durability, which is why it pills under gym friction.

What is the difference between Nulu and Everlux?

Nulu is soft, light, and delicate, made for yoga and everyday wear. Everlux is lululemon’s training fabric, positioned as its fastest-drying, and holds up much better to sweat and friction.

What is Athleta Powervita?

Athleta’s signature soft fabric with more substance and support than the buttery family. Owners describe it as holding you in while staying comfortable, and it handles real workouts well.

Which legging fabric is best for the gym?

Support and sweat fabrics: Everlux or Luxtreme from lululemon, Powervita from Athleta, or the sturdier budget blends. Save buttery fabrics like Nulu and Spacedye for low-friction days.