Lululemon Metal Vent Tech 1/2 Zip Nautical Navy / Nautical Navy. Men’s size L. Like new as worn less than five times. Only washed in cold water and hung dry when necessary. Happy buying on a great piece! Get it while you can! Seamless construction, anti-stink technology, and strategic venting make this long-sleeve half zip training-session ready.Lightweight fabric is sweat-wicking and four-way stretch features Designed for: Training Shine-bright : Reflective detail helps keep you on the radar in low light Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment Ventilation: Mesh construction for breathability