The Luis vest is an ultra-lightweight, quarter-zip windbreaker designed for maximum performance on warmer days. Weighing just 94g (3.34 ounces) in size medium, it offers the perfect balance of protection and breathability without the bulk. Made with INTERFACE-1™ technology fabric and Warming Effect #1, this short-sleeve vest is windproof and features a water-repellent finish to keep you dry in light rain.