{"product_id":"envelope-sleeping-bag","title":"Envelope Sleeping Bag","description":"\u003ch3\u003eHypothermia kills fast. An envelope bag that opens fully lets you move quickly if you need to evacuate in the dark.\u003c\/h3\u003e\n\n\u003ch3\u003eWhen it matters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvacuation from shelter at night: bag opens fully like a blanket. No fumbling with zippers in darkness—unzip or unfold, grab your gear, move.\u003c\/li\u003e\n\u003cli\u003eLayered cold protection: envelope design works over base layers without overheating when active. You can stay warm while hiking and shed the bag without stopping to adjust.\u003c\/li\u003e\n\u003cli\u003eExtended camping or bug-out: multiple weight options (1kg to 1.8kg) match different climates and seasons. Choose weight for your specific scenario.\u003c\/li\u003e\n\u003cli\u003ePost-shelter survival: sleeping bag doubles as insulation layer for makeshift shelter insulation if needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFull envelope design unzips to flat sleeping bag or wraps around you like a blanket.\u003c\/li\u003e\n\u003cli\u003eLightweight polyester or similar insulation—compresses small and dries faster than down.\u003c\/li\u003e\n\u003cli\u003eTemperature-rated by weight: 1kg bag rated for mild seasons, 1.8kg for cold weather (exact temps in specs).\u003c\/li\u003e\n\u003cli\u003ePortable: ranges from 1kg to 1.8kg, folds to backpack-sized bundle, doesn't require a stuffsack for basic storage.\u003c\/li\u003e\n\u003cli\u003eNon-obvious: sleeping pad redundancy. Envelope bag under you (half coverage) + partial cover stops convection loss when a pad isn't available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBuilt to last\u003c\/h3\u003e\n\u003cp\u003eInsulation compresses over time and loses efficiency—inspect for clumping or thin spots before each season. Seams are stress points; inspect zipper and stitching before deployment. Will NOT match the insulation performance of a quality down bag—synthetic insulation is bulkier for the same warmth. Not waterproof; store dry and use a waterproof cover in wet conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhere it fits your kit\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBug-Out Bag layer.\u003c\/strong\u003e Pairs with Emergency Bivvy Sack (bag + bivvy = complete shelter system) and Camo Field Poncho (poncho covers exposure, bag provides thermal regulation). Bag fills the warmth role; bivvy and poncho handle weather and concealment.\u003c\/p\u003e\n\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Synthetic insulation (polyester or equivalent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeights available:\u003c\/strong\u003e 1kg, 1.4kg, 1.6kg, 1.8kg (lighter for warm climates, heavier for cold)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal weight range:\u003c\/strong\u003e 1,018–1,850 grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColors:\u003c\/strong\u003e Green, Blue, Orange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosure:\u003c\/strong\u003e Full zipper, envelope opens flat for multi-position use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions when compressed:\u003c\/strong\u003e Typical backpack-roll size (varies by weight)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eField notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eChoose weight based on seasonal exposure, not just temperature. A 1.8kg bag is heavier but retains performance longer through repeated compression cycles.\u003c\/li\u003e\n\u003cli\u003eLay the bag flat on your ground insulation (pad, branches, leaves) to prevent convection loss to earth. Envelope design allows full contact area.\u003c\/li\u003e\n\u003cli\u003eSynthetic insulation clumps when wet but dries faster than down. After use in damp conditions, hang and air-dry for 12+ hours before storing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What temperature rating should I choose?\u003c\/strong\u003e A: Match the weight to your typical evacuation scenario. 1kg is spring\/fall, 1.4–1.6kg is mild winter, 1.8kg is extended cold. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this as a blanket instead of sleeping inside?\u003c\/strong\u003e A: Yes. Envelope design unfolds fully. Use it as ground insulation, over-blanket, or emergency makeshift shelter insulation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I store it long-term?\u003c\/strong\u003e A: Keep dry, loosely rolled (not compressed forever), in a cool location. Periodic recompression and unrolling prevents permanent material fatigue.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eCovered by the optional \u003ca href=\"\/pages\/guarantee\"\u003eWatchtower Guarantee\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e","brand":"Stand Fast Supply Co.","offers":[{"title":"Default Title","offer_id":67581856940261,"sku":"CJYDQTLY00296-Green-1.8kg","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/2967\/8565\/files\/1819632200562.jpg?v=1790578085","url":"https:\/\/watchtowersupply.com\/products\/envelope-sleeping-bag","provider":"Watchtower Supply Co.","version":"1.0","type":"link"}