Lululemon In The Flow Crop Yoga Pants Heathered Black (4) Whether we're working up a sweat at the gym or in the studio, we want crops that can keep up. Made with lightweight and breathable Seamless fabric, these no-fuss bottoms are engineered to help us fly through our squats and side planks. Lightweight, breathable Seamless fabric makes these crops a workout staple. Moisture-wicking technology pulls sweat away from your skin Where there are seams, they are chafe-resistant. Wide, smooth waistband covers without digging in. Color: Heathered Black, which is a dark grey. Seamless 90% Nylon, 10% Lycra Spandex.