Infinity Endurance Jacket ANTIFREEZE EBONY ZEST The Infinity Endurance jacket is a lightweight down jacket with a water-resistant outer fabric. The Infinity Endurance takes the features of the widely acclaimed Infinity jacket and adds the latest version of Pertex Endurance water-resistant coating to the super-light Pertex Quantum GL fabric. The jacket contains 210g/7oz (size large) of the best quality 850 fill European down we've ever used. The result is a very lightweight and very usable down