Katabatic Gear Flex 22 900

The Katabatic Gear Flex 22 900 is the goose-down counterpart to the Flex 22 850, holding the same 22°F (-6°C) comfort rating while shaving 28 g off total weight — 604 g versus 632 g — using 380 g of 900-fill-power down instead of 408 g of 850fp duck down. It's the clearest illustration in this lineup of what higher fill power buys: less material for the same warmth. Beyond the down, this version adds details not listed on the 850fp Flex 22: an internal pocket for small items, and a PFC-free DWR treatment — a more environmentally conscious finish than older fluorocarbon coatings. The shell is Pertex Quantum Eco ripstop with a Pertex Quantum Taffeta liner, both recycled and bluesign-certified, with a differential cut for even down loft and continuous horizontal baffles to stop shifting. Packed size matches the 850fp version at 30 x 18 cm / 8 litres. This is the "short" size for users up to 167 cm — a solid choice for thru-hikers prioritizing weight and sustainability over duck down's lower cost.