Lululemon men’s Metal Vent Breathe Long Sleeve. Like new! Size medium in heathered blue. 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