CORE BARRIERWe consider a vest to be a vital piece of equipment & we recognize the importance of getting it right. The Sottile Vest keeps the rain at bay & provides total windproofness but it still offers some stretch & breathability. Best of all it packs down to next to nothing so you can take it along on almost every ride. Sleek performance-fit lightweight packable jacket Fits in any jersey pocket without weighing you down Waterproof wind resistant & breathable fabric Mesh at underarm for added breathability Contrast autolock front zipper Zipper opening at back for access to jersey pockets Rear reflective tabs 100% polyester