Lululemon Metal Vent Breathe Short Sleeve *City Edition London / Silver Drop / Black We designed this lightweight and breathable top to keep the air flowing when you're pounding the pavement.Fabric is designed with integrated, open-hole Mesh ventilation to increase breathability breathable features Designed for: Training Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment No chafe: Seamless construction in the body minimizes chafing