{"product_id":"sac-de-couchage-hiver-naturehike-mg360","title":"-5°C Sleeping Bag (-7°C) | Naturehike MG360","description":"\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eWeight:\u003c\/b\u003e 1,440 g (M) \/ 1,620 g (L) \/ 1,810 g (XL)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eComfort temperature:\u003c\/b\u003e -7°C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eLimit temperature:\u003c\/b\u003e -14.2°C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eFilling:\u003c\/b\u003e SUNDOUCE Gold synthetic fibers — 180 g\/m² double layer\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eOuter fabric:\u003c\/b\u003e 20D 380T Nylon — fluorine-free water-repellent treatment (GRS certified)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eUnfolded dimensions:\u003c\/b\u003e M: 75 × 190 cm \/ L: 80 × 205 cm \/ XL: 85 × 220 cm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eCompressed dimensions:\u003c\/b\u003e M: 25 × 22 × 38 cm \/ L: 26 × 23 × 40 cm \/ XL: 26 × 23 × 42 cm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eThermal standard:\u003c\/b\u003e GB\/T 38426-2019 \/ ISO 23537\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eCertifications:\u003c\/b\u003e GRS (recycled fabric), GB 18401-2010 class A, fluorine-free (report ETK-00042501-MUL-2508)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eComfort -7°C synthetic winter bivouac sleeping bag: insulation capacity and real-world conditions\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNaturehike MG360 winter sleeping bag\u003c\/strong\u003e is sized for cold nights between -5°C and -15°C: autumn at high altitudes in the Alps and Pyrenees, winter in low and medium mountains, and base camps in snowy conditions. The comfort temperature is -7°C, measured according to GB\/T 38426-2019 and ISO 23537 standards using a thermal mannequin, a high R-value mattress, and long underwear. In real-world conditions — standard R-value 2-3 mattress, ambient humidity, accumulated fatigue — allow for a 3 to 5°C margin and a suitable insulating mattress: the ground transmits cold via conduction regardless of the bag. The mummy cut with an adjustable hood and shoulder collar reduces nighttime heat loss in the most exposed areas.\u003c\/p\u003e\n\u003ch3\u003eSUNDOUCE Gold 180 g\/m² filling: insulation maintained in damp conditions\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eSUNDOUCE Gold 180 g\/m² double-layer\u003c\/b\u003e filling accounts for 1,265 g of insulating material on the L model — three times the density of the MG120. In winter bivouacs, the technical argument for synthetic is concrete: SUNDOUCE microfilaments retain their insulating capacity when they absorb moisture, whereas \u003cb\u003enatural down loses 30 to 40% of its effectiveness when wet\u003c\/b\u003e. In cold, damp conditions — high-altitude fog, prolonged condensation in a tent, melting snow — this performance retention is a factor to consider when choosing filling. The stated insulating power is \u003cb\u003e5.29 CLO\u003c\/b\u003e, with a bacterial inhibition rate of over 90% maintained after machine washing, without specific protocols. The \u003cb\u003eGRS-certified 20D nylon\u003c\/b\u003e outer fabric incorporates a fluorine-free water-repellent treatment verified by an independent report. The compressed dimensions (25 × 22 × 38 cm in size M) are larger than those of a down bag with the same temperature range — a constraint to anticipate for backpacking routes. For a winter bivouac with gear carry, the \u003ca title=\"Aegismax G3 -8°C down 800 cuin\" href=\"\/en\/products\/sac-de-couchage-moins-10-degre-aegismax-g3\"\u003eAegismax G3\u003c\/a\u003e covers -8°C comfort for 1,350 g with 800 cuin down filling.\u003c\/p\u003e","brand":"Duvet Nomade","offers":[{"title":"MG360 \/ XL","offer_id":53361921851729,"sku":"14:200006151#MG360 - XL;200007763:201336100","price":169.0,"currency_code":"EUR","in_stock":false},{"title":"MG360 \/ L","offer_id":53361922015569,"sku":"14:496#MG360 - L;200007763:201336100","price":159.0,"currency_code":"EUR","in_stock":false},{"title":"MG360 \/ M","offer_id":53361921982801,"sku":"14:200002984#MG360 - M;200007763:201336100","price":129.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/9173\/4097\/files\/sac_de_couchage_naturehike_mg360.webp?v=1774186433","url":"https:\/\/duvet-nomade.com\/en\/products\/sac-de-couchage-hiver-naturehike-mg360","provider":"Duvet Nomade","version":"1.0","type":"link"}