The Rab Infinity Endurance Jacket is one of the lightest down insulation pieces that the brand has to offer, which makes it ideal for lightweight mountaineers. Every effort has been made to ensure that you get the very best level of performance, incorporating the highest lofting down whilst shedding unnecessary features to keep bulk to a minimum, making the jacket easy to stow your pack and great for use as an integral part of your layering system. Features Pertex Quantam GL fabric with Pertex Endurance coating outer Pertex Endurance hood, outer arms and cuffs Pertex quantam GL inner 850FP European goose down Stitch through baffle construction Helmet compatible hood, wired peak, tethered drawcord adjutment YKK front zip, mini internal insulated zip baffle, chin guard 2 YKK zipped handwarmer pockets 1 YKK zipped chest pocket 1 YKK internal security pocket Elasticated cuffs, hem drawcord Stuff sack Fit: Regular Glossary Pertex Quantam GLPertex Quantum GL it is 20% lighter than Pertex Quantum. This allows items to be made much lighter and still have the same levels of insulation. Ultra soft, it has the ideal balance of strength and weight, and the smallest packing volume of any Pertex material. Pertex EndurancePertex Endurance technology incorporates a lightweight, ultra thin, air permeable membrane that is both highly breathable and water and wind resistant. This layer protects the insulation material from the elements to maintain loft and retain warmth.