Lululemon Ultralu Square-Neck Workout Bra *Medium Support, B/C Cup In Black US 6
Keyhole in the back for airflow. Bra: 56% Nylon, 44% Lycra Elastane. Bra Lining: 83% Polyester, 17% Elastane. Four-way stretch. Added Lycra® fibre for stretch and shape retention. Middle Layer: 89% Nylon, 11% Elastane.