The Rab Neutrino 200 is a mummy-style down sleeping bag designed for two-season use, keeping campers and backpackers comfortably insulated on cool spring and summer nights down to its comfort rating of about +4°C.
Its 100% goose down fill with an 800 fill power offers an excellent warmth-to-weight ratio, while the recycled Pertex Quantum shell sheds light moisture and resists wear. Inside, a ripstop Pertex Quantum lining adds durability without adding bulk. When packing up, it compresses to roughly 20 x 20 x 30 cm and weighs just 0.579 kg, making it straightforward to fit into a busy pack.
Fill power (FP) measures how much space an ounce of down occupies—an 800 FP rating means more loft, trapping heat efficiently without extra mass. Weighing under 700 grams places this bag in the superlight class for mild conditions around 5°C, allowing you to trim pack weight without losing performance.
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RAB says about the Neutrino 200
Delivering a high warmth to weight ratio and now built with recycled materials, the Neutrino 200 is lightweight in your pack and on the planet. Suited to summer mountaineering, light weight backpacking and bikepacking trips.Pertex Quantum fabrics are lightweight, soft and packableTrapezoidal boxwall construction with differential cut, to maximise loft and warmthYKK 3/4 length main zip with down filled baffle to trap warmthYKK zipped internal stash pocketClose fitting adjustable neck baffle design for decreased heat lossYKK® 3/4 length main zip with synthetic filled baffle to trap warmthYKK® zipped internal stash pocketLeft and right hand bags can zip togetherYKK Anti-snag zip insert and anti snag internal zip guardHand-filled in Derbyshire UKZipped storage sack with water-resistant base for home storage Waterproof roll-top compression sack includedFill: 800FP European goose down with Nikwax hydrophobic fluorocarbon free finishTapered Mummy Shape