Rain or shine, these ultra-lightweight running trousers provide waterproof coverage without weighing you down. When the clouds part, they pack down small into a pocket for easy carrying. Weather ready:Nike Storm-FIT ADV technology combines windproof and waterproof fabric with advanced engineering and features to help keep you comfortable in harsh weather conditions. Their super-lightweight nylon shell has sealed seams to help you stay dry.,Packable design:Designed for packability, these trousers pack down into their own back pocket when you need to lose a layer.,Easy Wear:Zipped ankle vents make it easy to put these on or take them off over your shoes.