Align High-Rise Leggings
Lululemon's bestselling Align leggings are made from their proprietary Nulu™ fabric: 81% nylon, 19% Lycra elastane. Both are petroleum-derived synthetic plastics. Despite their premium price point ($98–$128), there is no organic or natural fiber content.
CRITICAL: Lululemon's Nulu™ fabric (used in Align leggings) is 81% nylon, 19% Lycra — both petroleum-based plastics. These leggings are worn skin-tight against your entire lower body during exercise, when pores are open and sweating maximizes absorption. Nylon sheds microplastics with every wash and every wear.
Why We Rated It This Way
Lululemon scores critically low on materials (nearly 100% synthetic), provides limited supply chain transparency, and has no pathway to plastic-free manufacturing. Their 2025 sustainability report acknowledges that only 6% of their nylon comes from recycled sources.
Chemical & Health Analysis
Nylon 6,6 (polyamide) microfibers
Each wash of nylon activewear releases an estimated 700,000 synthetic microfibers. Worn against sweating skin during exercise, nylon fibers and their chemical coatings are absorbed transdermally through open pores. Nylon is manufactured with caprolactam, a suspected neurotoxin.
Lycra / Spandex (polyurethane)
Spandex is a polyurethane-based plastic that contains isocyanates — highly reactive chemicals used in manufacturing that can remain as residues in finished fabric. Isocyanates are known respiratory sensitizers and skin irritants.
Disperse dyes (used to color nylon)
Nylon cannot be dyed with conventional dyes — it requires disperse dyes, several of which are classified as probable carcinogens by the EU. The US has not restricted these dyes. Disperse dye residues on fabric are released during wear and absorbed through skin.
PFAS (DWR water-repellent finish)
Many Lululemon products use a durable water repellent (DWR) finish containing PFAS 'forever chemicals.' PFAS accumulate in the body over time and are linked to kidney cancer, thyroid disease, immune suppression, and reduced vaccine efficacy in children.
All health claims are based on published, peer-reviewed research. PFR cites primary sources from the NIH, WHO, IARC, and peer-reviewed journals. This information is for educational purposes and does not constitute medical advice.
Synthetic Plastic Content
synthetic plastic fiber content by weight
