When feeling nothing is everything. The lululemon Align collection, powered by Nulu fabric, is so weightless and buttery-soft, all you feel is your practice. Designed for Yoga. Intended to sit at bottom of calf. Hidden waistband pocket fits a card or key, and won't get in your way. This collection's great for low-impact workouts like yoga or whenever you want to feel really, really comfortable. NuluTM Fabric Feels Buttery-Soft and Light as a Cloud. Body: 81% Nylon, 19% Lycra elastane. Lining: 90% Nylon, 10% Lycra elastane.