Upgraded Waterproof & Stretch Jacket - The upgraded fabric is more elastic than ordinary ones.2.5 layer waterproof & breathable technology,outer shell is made of ripstop,stretch and windproof polyester fabric.Interior seams are 100% fully sealed,prevent water from seeping in.Interior is laminated TPU membrane with 5000mm waterproofing and 3000g/m2/24hr breathability,to ensure you are dry and comfortable. Enhanced Breathability – Back air vents improve air circulation, dispersing excess heat and maintaining dry. Ultralight & Packable – Jacket is super lightweight. Can be folded and tucked into its back pocket and convert to a small bag. Folded jacket is of small volume. You can even put it in your pocket. Reflective – Two reflective stripes and a reflective logo on the front; One reflective printing on the back. Keep you safe in low light environment. Extras - One zippered back pocket with reversible double zipper pullers, easy to use when jacket is converted to a bag. One zippered chest pocket for easy-reach storage. Elasticized hem and cuffs seal out the elements. Drop tail hem is slightly longer, designed for both cycling and running.