The Rab Alpine 800 is a duck down filled, winter sleeping bag with a slim fitting, tapered mummy shape.The Alpine range is built for altitude, whether you’re high in the Alps or deep in the Himalaya. A slim fitting, lightweight, duck down bag, it offers a balance of comfort and packability for hut-to-hut missions, mountain trekking or lightweight bike and backpacking.Materials20D Pertex® Quantum nylon ripstop with fluorocarbon-free DWR650FP R.D.S Certified European Duck Down with Nikwax fluorocarbon-free Hydrophobic FinishISO EN Temperature RatingsRab Sleep Limit: -16°CComfort Limit: -16°CFeaturesWeight saving chevron baffle design on upper torso, reduces down migration and optimises core warmth.Trapezoidal boxwall construction with differential cut, to maximise loft and warmthYKK zipped internal stash pocket3-dimensional shaped down filled neck collar to seal in warmthYKK 3/4 length main zip with down filled baffle to trap warmthLeft Hand ZipYKK Anti-snag zip insert and anti snag internal zip guardAngled foot box for relaxed sleeping postureZipped cotton sack with water-resistant base for home storageDrawcord stuffsack includedHand-filled in Derbyshire UKTapered Mummy ShapeA closer lookDesigned for maximum warmth, the chevron shaped baffles ensure the down is held over the centre of the body and prevent down migration, while the trapezoidal chamber design eliminates cold spots. Cut to have a ‘mummy taper’ shape and angled foot box; this bag has a low pack size and weight without compromising on warmth or comfort and still allows for movement. An ergonomically designed, close-fitting internal collar with a hood drawcord, as well as a 3/4 length YKK anti-snag zip with an insulating draft tube to keep out the cold. Comes with a dry bag compression stuff sack for transport and cotton sack with water-resistant base for storage.Hand Filled In Derbyshire. Rab hand fill all their down sleeping bags at their factory in Derbyshire, UK. This ensures that every baffle is filled as required and that the down within has never been compressed or stored in a way that could impair performance. The bags are filled using a smaller diameter pipe and a compressed air system, which blows the feathers into each chamber. Before the bags are filled, one empty shell from each batch is weighed to ensure they are within tolerance. Precision scales are then used to measure the down for each chamber and, once complete, the finished bag is weighed again. To avoid being rejected, the bag’s total weight must be less than 10% over and cannot go under the intended weight. Scales are accurate to 0.5g and are routinely re-calibrated using weights of 1000g, 100g, 10g and 1g. Rab Womens Alpine 800 Sleeping Bag - Regular