Lululemon Swiftly Breeze Muscle Tank NWT Size 4 Vented Camo Silver Drop / Vapor grey New and unused. No defects. Designed for: Run Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment Lycra®: Added Lycra® fibre for shape retention Ventilation: Mesh construction for breathability No ride up: Wider hem helps your shirt stay put Recycled polyester: 100% of the polyester in this product is recycled