{"product_id":"sea-to-summit-spark-down-sleeping-bag-beluga-black","title":"Sea to Summit Spark Down Sleeping Bag Beluga Black","description":"\u003ch2 data-section-id=\"1v916ds\" data-start=\"69\" data-end=\"109\"\u003eSea to Summit Spark Down Sleeping Bag\u003c\/h2\u003e\n\u003cp data-start=\"111\" data-end=\"432\"\u003eThe \u003cstrong data-start=\"115\" data-end=\"156\"\u003eSea to Summit Spark Down Sleeping Bag\u003c\/strong\u003e is built for riders and ultralight adventurers who count every gram but still demand real backcountry performance. Designed for \u003cstrong data-start=\"285\" data-end=\"331\"\u003efast-and-light backpacking and bikepacking\u003c\/strong\u003e, the Spark delivers exceptional warmth-to-weight efficiency in a minimalist, highly packable design.\u003c\/p\u003e\n\u003cp data-start=\"434\" data-end=\"733\"\u003eAt its core is \u003cstrong data-start=\"449\" data-end=\"489\"\u003e900+ fill power Ultra-Dry goose down\u003c\/strong\u003e, offering industry-leading loft, compressibility, and reliable insulation in variable conditions. Wrapped in ultra-light \u003cstrong data-start=\"611\" data-end=\"632\"\u003e10D nylon fabrics\u003c\/strong\u003e, the Spark disappears into your pack while still delivering serious warmth when temperatures drop.\u003c\/p\u003e\n\u003cp data-start=\"735\" data-end=\"976\"\u003eThe Spark isn’t just about saving weight—it’s about adaptability. The \u003cstrong data-start=\"805\" data-end=\"829\"\u003eFree-Flow Zip system\u003c\/strong\u003e provides multiple ventilation options, allowing you to fine-tune airflow, vent heat, or fully open the bag into a quilt when conditions warm up.\u003c\/p\u003e\n\u003cp data-start=\"978\" data-end=\"1310\"\u003eDespite its ultralight focus, the Spark maintains comfort with an \u003cstrong data-start=\"1044\" data-end=\"1069\"\u003eergonomic mummy shape\u003c\/strong\u003e, technical hood, and anatomical footbox that maximize thermal efficiency without feeling overly restrictive. A combination of vertical chest baffles and box-wall construction helps keep insulation evenly distributed for consistent warmth.\u003c\/p\u003e\n\u003cp data-start=\"1312\" data-end=\"1519\"\u003eWhether you’re chasing long-distance miles, dialing in a minimalist bikepacking setup, or simply looking for the lightest possible sleep system, the Spark is designed to go further—without weighing you down.\u003c\/p\u003e\n\u003chr data-start=\"1521\" data-end=\"1524\"\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"1526\" data-end=\"1542\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"1543\" data-end=\"2123\"\u003e\n\u003cli data-section-id=\"pmzqld\" data-start=\"1543\" data-end=\"1622\"\u003e\n\u003cstrong data-start=\"1545\" data-end=\"1579\"\u003e900+ fill power Ultra-Dry Down\u003c\/strong\u003e for maximum warmth-to-weight performance\u003c\/li\u003e\n\u003cli data-section-id=\"189u36x\" data-start=\"1623\" data-end=\"1702\"\u003e\n\u003cstrong data-start=\"1625\" data-end=\"1665\"\u003eUltralight 10D shell \u0026amp; liner fabrics\u003c\/strong\u003e for minimal packed size and weight\u003c\/li\u003e\n\u003cli data-section-id=\"has9pp\" data-start=\"1703\" data-end=\"1775\"\u003e\n\u003cstrong data-start=\"1705\" data-end=\"1729\"\u003eFree-Flow Zip system\u003c\/strong\u003e for ventilation and quilt-style versatility\u003c\/li\u003e\n\u003cli data-section-id=\"yzeaeg\" data-start=\"1776\" data-end=\"1837\"\u003e\n\u003cstrong data-start=\"1778\" data-end=\"1802\"\u003eUltralight mummy fit\u003c\/strong\u003e optimized for thermal efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"1lrqk0x\" data-start=\"1838\" data-end=\"1923\"\u003e\n\u003cstrong data-start=\"1840\" data-end=\"1895\"\u003eBox baffle construction with vertical chest baffles\u003c\/strong\u003e to prevent down migration\u003c\/li\u003e\n\u003cli data-section-id=\"ftmotp\" data-start=\"1924\" data-end=\"1997\"\u003e\n\u003cstrong data-start=\"1926\" data-end=\"1967\"\u003eTechnical hood and anatomical footbox\u003c\/strong\u003e for improved heat retention\u003c\/li\u003e\n\u003cli data-section-id=\"16fz4xf\" data-start=\"1998\" data-end=\"2058\"\u003e\n\u003cstrong data-start=\"2000\" data-end=\"2030\"\u003eHighly compressible design\u003c\/strong\u003e for fast-and-light travel\u003c\/li\u003e\n\u003cli data-section-id=\"1wwjirt\" data-start=\"2059\" data-end=\"2123\"\u003e\n\u003cstrong data-start=\"2061\" data-end=\"2088\"\u003eZip coupling compatible\u003c\/strong\u003e with select Sea to Summit models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2125\" data-end=\"2128\"\u003e\n\u003ch3 data-section-id=\"11oqhle\" data-start=\"2130\" data-end=\"2159\"\u003eSpecs (Regular – Approx.)\u003c\/h3\u003e\n\u003cul data-start=\"2160\" data-end=\"2343\"\u003e\n\u003cli data-section-id=\"1gwg4c0\" data-start=\"2160\" data-end=\"2214\"\u003e\n\u003cstrong data-start=\"2162\" data-end=\"2175\"\u003eBest Use:\u003c\/strong\u003e Ultralight Backpacking \/ Bikepacking\u003c\/li\u003e\n\u003cli data-section-id=\"zd3hvh\" data-start=\"2215\" data-end=\"2273\"\u003e\n\u003cstrong data-start=\"2217\" data-end=\"2240\"\u003eTemperature Rating:\u003c\/strong\u003e ~30°F \/ -1°C (varies by model)\u003c\/li\u003e\n\u003cli data-section-id=\"1cul2jh\" data-start=\"2274\" data-end=\"2310\"\u003e\n\u003cstrong data-start=\"2276\" data-end=\"2287\"\u003eWeight:\u003c\/strong\u003e ~1 lb 5.8 oz (619 g)\u003c\/li\u003e\n\u003cli data-section-id=\"w4gz8n\" data-start=\"2311\" data-end=\"2343\"\u003e\n\u003cstrong data-start=\"2313\" data-end=\"2335\"\u003eCompressed Volume:\u003c\/strong\u003e ~5.3L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2345\" data-end=\"2348\"\u003e\n\u003cp data-start=\"2350\" data-end=\"2526\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIf your goal is to go lighter, faster, and farther, the Spark lives up to its name—delivering premium warmth and versatility in one of the most compact sleep systems available.\u003c\/p\u003e","brand":"Sea to Summit","offers":[{"title":"30 degree \/ Regular","offer_id":51977018605799,"sku":null,"price":549.0,"currency_code":"USD","in_stock":true},{"title":"30 degree \/ Long","offer_id":51977018671335,"sku":null,"price":579.0,"currency_code":"USD","in_stock":true},{"title":"15 degree \/ Regular","offer_id":51977018638567,"sku":null,"price":649.0,"currency_code":"USD","in_stock":true},{"title":"15 degree \/ Long","offer_id":51977018704103,"sku":null,"price":689.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/1969\/2472\/files\/sea-to-summit-sleeping-bag-sea-to-summit-spark-down-sleeping-bag-beluga-black-1232283698.webp?v=1776091869","url":"https:\/\/ottawabikeandtrail.com\/products\/sea-to-summit-spark-down-sleeping-bag-beluga-black","provider":"Ottawa Bike and Trail, LLC","version":"1.0","type":"link"}