Lightweight and packableusing a waterproof and breathable ripstop fabric endura have created a jacket that will keep you weather protected but won39t weigh you down when it39s not needed it comes complete with it39s own stuff sack so you can easily be stowed in a pack or pocket with a central mesh back you get excellent breathability so you shouldn39t overheat and start to feel clammy waterproofmeasured in mm of water that can be held by the fabric without leaking 1 000mm is the