Heading out on expedition? You'll need a waterproof you can rely on. Ossus is a savvy choice, offering reliable shelter from wind and rain, thanks to the AquaDry Membrane construction with adjustable hood. We think it's a worthy addition to our Duke of Edinburgh's Award Collection. Classic waterproof shell jacket from Craghoppers Duke of Edinburghs Award Collection. Ossus is a serious performer, providing effective protection from showers thanks to the AquaDry Membrane construction. The grown-on hood offers extra coverage and there are three handy pockets - one OS-map sized. A practical choice for the expedition bag.