{"title":"-5 degree sleeping bag","description":"\u003ch2\u003e-5 degree sleeping bag: what the comfort temperature means in real conditions\u003c\/h2\u003e\n\u003cp\u003eThe \u003cb\u003ecomfort temperature of a -5 degree sleeping bag\u003c\/b\u003e indicates the minimum temperature at which an average sleeper can sleep without feeling cold under standardized conditions: an insulating mattress with an R-value of at least 3.5, long thermal underwear, hood closed, and a dry environment. In real-world \u003cb\u003ebivouac\u003c\/b\u003e conditions at altitude, a margin of 3 to 5 °C is recommended to account for metabolism, fatigue, and ambient humidity. The \u003cb\u003elimit temperature\u003c\/b\u003e, here at -12 °C, corresponds to the tolerance threshold of a standard man, below which sleep becomes uncomfortable. The extreme temperature is a theoretical survival threshold and does not represent a usage value.\u003c\/p\u003e\n\u003ch3\u003eSynthetic insulation for a -5°C comfort sleeping bag\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003e-5 degree sleeping bag\u003c\/b\u003e with hollow fiber synthetic insulation offers concrete advantages for certain uses: it retains partial insulation even when damp, it is easy to maintain (machine wash at 30 °C), and its purchase price is lower than an equivalent natural down model. The trade-off is a higher weight and compressed volume compared to a natural down \u003cb\u003e-5 degree sleeping bag\u003c\/b\u003e. For static bivouacs, car camping, or short trips without significant carrying constraints, this profile remains appropriate. For treks involving several days of carrying where weight is a priority, a \u003ca href=\"\/en\/collections\/sac-de-couchage-0-degre\"\u003e0 degree sleeping bag\u003c\/a\u003e model in natural down generally offers a better weight-to-insulation ratio in a similar temperature range.\u003c\/p\u003e\n\u003ch2\u003e-5 degree or 0 degree sleeping bag: what is the difference for bivouacking?\u003c\/h2\u003e\n\u003cp\u003eA \u003cb\u003e-5 degree comfort sleeping bag\u003c\/b\u003e (negative) provides an additional thermal margin that is useful as soon as nights regularly drop below 0 °C: late-season mountain trips, autumn in the Alps or Pyrenees above 1,500 m, or mid-season outings with significant temperature fluctuations between day and night. For spring and summer outings up to 2,000 m where nights remain above 0 °C, a \u003ca href=\"\/en\/collections\/sac-de-couchage-0-degre\"\u003e0 degree sleeping bag\u003c\/a\u003e is better sized and lighter. For winter bivouacs where nights are regularly below -7 °C, the \u003ca href=\"\/en\/collections\/sac-de-couchage-moins-10\"\u003e-10°C collection\u003c\/a\u003e provides the necessary margin.\u003c\/p\u003e\n\u003ch3\u003eThe role of the insulating mattress with a -5°C bag\u003c\/h3\u003e\n\u003cp\u003eThe mattress accounts for 40 to 50% of the total insulation of the sleeping system. Without a mattress with an R-value of at least 3.5, the ground absorbs body heat through conduction, and the temperatures advertised for the bag cannot be achieved in real conditions. For nights between -3 °C and -7 °C, an R-value of 4 is a reliable benchmark. A thermal liner can provide an additional margin of +3 to +5 °C, which is useful on colder nights or for those who feel the cold easily.\u003c\/p\u003e","products":[{"product_id":"sac-de-couchage-moins-5-naturehike-mj600","title":"-5 Sleeping bag | Naturehike MJ600","description":"\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eWeight:\u003c\/b\u003e 2,300 g\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eDimensions:\u003c\/b\u003e 210 x 80 cm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eComfort temperature:\u003c\/b\u003e -5 °C\u003cb\u003e\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eLimit temperature:\u003c\/b\u003e -12 °C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eFilling:\u003c\/b\u003e Synthetic hollow cotton (1,300 g)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eOuter fabric:\u003c\/b\u003e Water-repellent 190T silk polyester\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eLining:\u003c\/b\u003e Soft-touch 190T pongee\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eType:\u003c\/b\u003e Mummy with insulated hood\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eMassive synthetic insulation for winter camping\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNaturehike MJ600 -5 sleeping bag\u003c\/strong\u003e is designed for static camping and vanlife when the thermometer drops below zero. By ignoring weight constraints, this model prioritizes exceptional insulation thickness. Its \u003cb\u003ehollow cotton filling\u003c\/b\u003e retains its thermal properties even in very humid environments, where natural down would lose its effectiveness without rigorous maintenance.\u003c\/p\u003e\n\u003ch3\u003eTactile comfort and thermal locking\u003c\/h3\u003e\n\u003cp\u003eThe inside of the bag is lined with a \u003cb\u003e190T pongee\u003c\/b\u003e lining, providing an immediate warm and soft feel, unlike the cold nylons of technical bags. The mummy cut, coupled with a thick insulated hood and a neck drawstring, prevents the air heated by your body from escaping. It is a true cocoon for harsh nights.\u003c\/p\u003e\n\u003cp\u003eHowever, if your activity requires carrying your equipment on your back for several hours in winter conditions (-8°C), the technological weight reduction provided by the goose down of the \u003ca title=\"See the Aegismax G3 ultra-light and warm\" href=\"\/en\/products\/sac-de-couchage-moins-5-degre-aegismax-g3\"\u003eAegismax G3\u003c\/a\u003e will become an essential selection criterion.\u003c\/p\u003e","brand":"Ma boutique","offers":[{"title":"MJ600 \/ Brown","offer_id":52642467545425,"sku":"14:200002984#MJ600 - Brown;200007763:201441035","price":99.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/9173\/4097\/files\/sac_de_couchage_-5_degr_s_naturehike_mj600.webp?v=1767034324"},{"product_id":"sac-de-couchage-moins-5-degres-blacksnow","title":"-5 degree sleeping bag | Blacksnow","description":"\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eWeight:\u003c\/b\u003e 1,450 g\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eComfort temperature:\u003c\/b\u003e -5 °C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eFill:\u003c\/b\u003e 800 cuin white goose down (1,000 g)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eOuter fabric:\u003c\/b\u003e 20D 400T water-repellent nylon\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eDimensions:\u003c\/b\u003e 210 × 80 cm (50 cm at the feet)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eComfort guaranteed for freezing nights\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBlack Snow -5 degree sleeping bag\u003c\/strong\u003e is designed for outdoor enthusiasts who require immediate and reliable thermal insulation. Unlike ultra-light models that require careful management of nighttime clothing, this \u003cb\u003edown sleeping bag\u003c\/b\u003e relies on a massive amount of fill. The goal is straightforward: trap a considerable volume of warm air to instantly stop the feeling of cold as soon as you slide inside.\u003c\/p\u003e\n\u003ch3\u003eThermal barrier and protective fabric\u003c\/h3\u003e\n\u003cp\u003eThe even distribution of \u003cb\u003e800 cuin goose down\u003c\/b\u003e throughout the mummy-style cut ensures enveloping insulation. The \u003cb\u003e400T nylon\u003c\/b\u003e outer shell acts as a sturdy shield against wind and condensation, protecting the integrity of the down. It is a \u003cb\u003ewarm sleeping bag\u003c\/b\u003e designed for reliability and ease of use during moderate winter bivouacs.\u003c\/p\u003e\n\u003cp\u003eIf you are looking for similar insulation for your cold nights but want to avoid the maintenance of natural down in favor of very thick synthetic cotton fill, the \u003ca href=\"\/en\/products\/sac-de-couchage-moins-5-naturehike-mj600\" title=\"Discover the synthetic Naturehike MJ600\"\u003eNaturehike MJ600\u003c\/a\u003e model is the ideal option.\u003c\/p\u003e","brand":"Ma boutique","offers":[{"title":"Green","offer_id":52647350468945,"sku":"14:100018786#1450g green","price":149.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/9173\/4097\/files\/sac_de_couchage_-5_blacksnow.webp?v=1772302360"},{"product_id":"sac-de-couchage-moins-5-degres-jungle-king","title":"-5 degree sleeping bag | CY-24SD04 Jungle King","description":"\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eWeight:\u003c\/b\u003e 1,500 g\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eComfort temperature:\u003c\/b\u003e -5°C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eLimit temperature:\u003c\/b\u003e -20°C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eFill:\u003c\/b\u003e 650 FP duck down (900 g)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eOuter fabric:\u003c\/b\u003e Durable 20D 400T nylon\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eLining:\u003c\/b\u003e Soft 320T Chunya textile\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cb\u003eDimensions:\u003c\/b\u003e 210 × 80 × 50 cm\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eControlled warmth and robustness for cold bivouacs\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e-5 degree Jungle King sleeping bag\u003c\/strong\u003e is aimed at users who reject the fragility of certain ultra-light models. Designed for rough terrain, it prioritizes a thick protective shell and massive fill to keep you secure at night when frost sets in. It is a \u003cb\u003ewinter sleeping bag\u003c\/b\u003e designed for durability and peace of mind in challenging natural environments.\u003c\/p\u003e\n\u003ch3\u003eGenerous fill and textile lining\u003c\/h3\u003e\n\u003cp\u003eWith its 900 grams of \u003cb\u003e650 FP (Fill Power) duck down\u003c\/b\u003e, this model generates dense and stable insulation. The curved mummy shape limits excess air volume that needs heating, blocking heat loss at the joints. The \u003cb\u003e400T nylon\u003c\/b\u003e outer fabric offers a solid barrier against friction and moisture, while the Chunya lining ensures immediate tactile comfort.\u003c\/p\u003e\n\n\u003cp\u003eIf you are looking for an envelope shape that offers more freedom of movement while benefiting from the premium insulation of goose down for milder mid-season nights, the wide geometry of the \u003ca href=\"\/en\/products\/naturehike-winter-duck-down-sleeping-bag-adult-envelope-down-warm-sleeping-bag-three-seasons-suitable-for-camping-trips\" title=\"Discover the Naturehike CW400 sleeping bag\"\u003eNaturehike CW400\u003c\/a\u003e will be an excellent alternative.\u003c\/p\u003e","brand":"Duvet Nomade","offers":[{"title":"Blue","offer_id":52950897000785,"sku":"14:29#Ink Blue","price":159.0,"currency_code":"EUR","in_stock":true},{"title":"Yellow","offer_id":52950897033553,"sku":"14:366#Aauratus","price":159.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/9173\/4097\/files\/1_cd6aca67-36d4-4f4c-8a53-25ea74cafd70.webp?v=1769983884"},{"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/9173\/4097\/collections\/sac-de-couchage-5.webp?v=1769623754","url":"https:\/\/duvet-nomade.com\/en\/collections\/sac-de-couchage-moins-5-degres.oembed","provider":"Duvet Nomade","version":"1.0","type":"link"}