The Rab Infinty jacket is the latest example of how Rabs close relationship with their fabric & down supliers has enabled us to create an amazing lightweight technical piece. We use Pertex Quantum GL 10D which is the lightest incarnation of this ever popular fabric & we fill this with 30 years of down construction know-how & 210g/7oz (size large) of the best quality US850 fill European down we've ever used. The finished product is 460g/16oz of shiny loveliness that rivals the warmth of many jackets twice its weight. With just 15g less down than the classic Neutrino Endurance, a fixed hood (that fits easily under a helmet) & a stitch through baffle construction that stabilses the very fine down, the Infinity looks set to become another must-have piece for anyone whose prime concerns are warmth, weight & packability.