{"product_id":"rab-neutrino-18-c-sleeping-bag-saco-de-pluma-para-alpinismo-invernal","title":"Rab Neutrino -18°C Sleeping Bag | Down Bag for Winter Mountaineering","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eRab Neutrino -18°C\u003c\/strong\u003e is a down sleeping bag designed to offer \u003cstrong\u003emaximum thermal protection with a still contained weight\u003c\/strong\u003e for winter alpine activities, technical bivouacs, and cold mountains where insulation no longer compromises.\u003c\/p\u003e\n\u003cp\u003eWith \u003cstrong\u003e800FP European goose down\u003c\/strong\u003e, \u003cstrong\u003eL.O.F.T 3D™\u003c\/strong\u003e construction, and strategic distribution of \u003cstrong\u003ePertex® Quantum\u003c\/strong\u003e fabrics, this model is in the warmest range of the Neutrino family, designed for winter ascents, high mountain, and trips where sustained cold requires a serious, packable, and technically capable bag.\u003c\/p\u003e\n\n\u003ch2\u003eReal Technical Performance\u003c\/h2\u003e\n\u003cp\u003eWithin the Neutrino range, this model is clearly oriented towards \u003cstrong\u003ereal winter use\u003c\/strong\u003e. It maintains the family's philosophy—great warmth-to-weight ratio, compressibility, and alpine focus—but elevates the insulation level for cold nights, high altitudes, and demanding bivouacs.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eL.O.F.T 3D™\u003c\/strong\u003e construction reduces down migration and improves thermal uniformity, while the use of \u003cstrong\u003e20D Pertex® Quantum\u003c\/strong\u003e in the base and footbox provides greater resistance in areas of wear and compression, leaving the \u003cstrong\u003e10D Pertex® Quantum\u003c\/strong\u003e in the upper part to maintain lightness and packability.\u003c\/p\u003e\n\u003cp\u003eThe taper fit mummy shape, thermal collar, anatomical hood, and zipper baffle help minimize heat loss when conditions truly harden.\u003c\/p\u003e\n\n\u003ch2\u003eQuantitative Technical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1280 g\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eFill:\u003c\/strong\u003e 800FP European goose down with fluorocarbon-free hydrophobic finish\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eDown fill weight:\u003c\/strong\u003e 800 g\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003ePrimary outer fabric:\u003c\/strong\u003e 10D Pertex® Quantum ripstop (26 g\/m²) with fluorocarbon-free DWR\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eSecondary outer fabric:\u003c\/strong\u003e 20D Pertex® Quantum ripstop (38 g\/m²) with fluorocarbon-free DWR\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eLining:\u003c\/strong\u003e 20D recycled nylon, 38 g\/m²\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eComfort temperature:\u003c\/strong\u003e -10°C\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eLimit temperature:\u003c\/strong\u003e -18°C\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eExtreme temperature:\u003c\/strong\u003e -40°C\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eCompressed size:\u003c\/strong\u003e 22 x 40 cm\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e L.O.F.T 3D™\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eShape:\u003c\/strong\u003e Taper fit mummy\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eComparison within the range\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNeutrino 0°C\u003c\/strong\u003e and \u003cstrong\u003eNeutrino -6°C\u003c\/strong\u003e cover alpine shoulder seasons and cool mountains. The \u003cstrong\u003eNeutrino -12°C\u003c\/strong\u003e already enters colder, more versatile winter terrain. This \u003cstrong\u003eNeutrino -18°C\u003c\/strong\u003e represents the warmest step in the standard family, designed for serious winter conditions, technical bivouacs, and users who need more thermal margin without jumping to expedition ranges.\u003c\/p\u003e\n\u003cp\u003eCompared to heavier or less technical ranges, it offers a very solid proposition for winter mountaineering with a better weight-to-volume-to-thermal performance ratio. Compared to Mythic, it prioritizes robust construction and wider use in real cold.\u003c\/p\u003e\n\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\n  \u003cli\u003eWinter mountaineering\u003c\/li\u003e\n\n  \u003cli\u003eTechnical bivouacs in high mountains\u003c\/li\u003e\n\n  \u003cli\u003eAscents in sustained cold\u003c\/li\u003e\n\n  \u003cli\u003eAlpine trekking and light expeditions in very cold conditions\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003eIs it for you?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eYes\u003c\/strong\u003e, if you are looking for a technical down sleeping bag for real winter, with a lot of insulation and a very competitive warmth-to-weight ratio.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYes\u003c\/strong\u003e, if you do bivouacs, mountaineering, or cold mountain activities and need a bag that is significantly warmer than a 3-4 season model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNo\u003c\/strong\u003e, if your primary use will be summer, temperate trekking, or refuges. In that case, lighter Neutrino models or less thermal ranges would be more suitable.\u003c\/p\u003e","brand":"Rab","offers":[{"title":"REG \/ GDP","offer_id":56002117730630,"sku":"QSN-20-GDP-REG-LZ","price":600.0,"currency_code":"EUR","in_stock":false},{"title":"LNG \/ GDP","offer_id":56002117763398,"sku":"QSN-20-GDP-LNG-LZ","price":624.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/3824\/0070\/files\/rab-neutrino-800-down-sleeping-bag-18c-saco-tecnico-invernal-avanzado-7630684.jpg?v=1771656199","url":"https:\/\/mountaingroup.es\/en\/products\/rab-neutrino-18-c-sleeping-bag-saco-de-pluma-para-alpinismo-invernal","provider":"Mountain Group","version":"1.0","type":"link"}