{"product_id":"sea-to-summit-spark-pro-900-down-sleeping-bag","title":"Sea to Summit Spark Pro 900+ Down Sleeping Bag","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003ctitle\u003eSpark Pro Down Sleeping Bag\u003c\/title\u003e\u003cstyle\u003e\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@400;600;700;800\u0026family=Barlow:wght@300;400;500;600\u0026display=swap');\n:root { --black: #0a0a0a; --white: #ffffff; --mid: #f5f5f5; --border: #e8e8e8; --muted: #999; --body: #222; }\n* { box-sizing: border-box; margin: 0; padding: 0; }\n.spur-wrap { font-family: 'Barlow', sans-serif; background: var(--white); color: var(--black); max-width: 1100px; margin: 0 auto; padding: 48px 24px; }\n.spur-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 48px; border-bottom: 1px solid var(--border); padding-bottom: 24px; flex-wrap: wrap; gap: 12px; }\n.spur-title { font-family: 'Barlow Condensed', sans-serif; font-size: clamp(28px, 5vw, 48px); font-weight: 800; letter-spacing: -0.02em; line-height: 1; text-transform: uppercase; }\n.spur-meta { font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }\n.tab-radio { display: none; }\n.tab-nav { display: flex; gap: 4px; margin-bottom: 32px; flex-wrap: wrap; }\n.tab-nav label { font-family: 'Barlow Condensed', sans-serif; font-size: 14px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 10px 24px; background: var(--mid); color: var(--muted); border: 1px solid var(--border); cursor: pointer; transition: all 0.15s; border-radius: 2px; display: inline-block; user-select: none; }\n.tab-nav label:hover { color: var(--black); border-color: #aaa; }\n.spur-panels .tab-panel { display: none; }\n#tab-desc:checked ~ .tab-nav label[for=\"tab-desc\"],\n#tab-key:checked ~ .tab-nav label[for=\"tab-key\"],\n#tab-specs:checked ~ .tab-nav label[for=\"tab-specs\"],\n#tab-care:checked ~ .tab-nav label[for=\"tab-care\"] { background: var(--black); color: var(--white); border-color: var(--black); }\n#tab-desc:checked ~ .spur-panels .desc-panel { display: block; }\n#tab-key:checked ~ .spur-panels .key-panel { display: block; }\n#tab-specs:checked ~ .spur-panels .specs-panel { display: block; }\n#tab-care:checked ~ .spur-panels .care-panel { display: block; }\n.spur-panel p { font-size: 14px; font-weight: 300; line-height: 1.7; color: var(--body); margin-bottom: 16px; }\n.desc-intro { font-size: 16px; font-weight: 400; line-height: 1.65; color: var(--body); margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }\n.key-section { border-bottom: 1px solid var(--border); padding: 16px 0; }\n.key-section:last-child { border-bottom: none; }\n.key-title { font-family: 'Barlow Condensed', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px; }\n.key-desc { font-size: 14px; font-weight: 300; color: var(--body); line-height: 1.5; }\n.spec-row { display: grid; grid-template-columns: 220px 1fr; border-bottom: 1px solid var(--border); }\n.spec-key { font-size: 12px; font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); padding: 12px 16px 12px 0; }\n.spec-val { font-size: 14px; font-weight: 300; color: var(--body); padding: 12px 0; line-height: 1.5; }\n.spec-category { font-family: 'Barlow Condensed', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin: 24px 0 8px 0; color: var(--muted); }\n.spec-category:first-child { margin-top: 0; }\n@media (max-width: 600px) { .spec-row { grid-template-columns: 1fr; } .spec-key { padding-bottom: 2px; } .spec-val { padding-top: 0; padding-bottom: 12px; } }\nhtml[data-theme=\"dark\"] { --black: #f0f0f0; --white: #0a0a0a; --mid: #1a1a1a; --border: #333; --muted: #888; --body: #ccc; }\nhtml[data-theme=\"dark\"] .spur-panels { background: var(--white); }\nhtml[data-theme=\"dark\"] .key-section { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .spur-header { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .desc-intro { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .spec-row { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .tab-nav label { background: #1a1a1a; color: #888; border-color: #333; }\n\u003c\/style\u003e\u003cscript src=\"chrome-extension:\/\/idnnbdplmphpflfnlkomgpfbpcgelopg\/inpage.js\" id=\"xverse-wallet-provider\" data-is-priority=\"true\"\u003e\u003c\/script\u003e\u003cdiv class=\"spur-wrap\"\u003e\n\u003cdiv class=\"spur-header\"\u003e\n\u003cdiv class=\"spur-title\"\u003eSpark Pro Down Sleeping Bag\u003c\/div\u003e\n\u003cdiv class=\"spur-meta\"\u003e900+ Fillpower Goose Down · 2 Temp Ratings · 2 Sizes · Lightweight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-desc\" class=\"tab-radio\" checked\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-key\" class=\"tab-radio\"\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-specs\" class=\"tab-radio\"\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-care\" class=\"tab-radio\"\u003e\u003cdiv class=\"tab-nav\"\u003e\n\u003clabel for=\"tab-desc\"\u003eDescription\u003c\/label\u003e\u003clabel for=\"tab-key\"\u003eKey Features\u003c\/label\u003e\u003clabel for=\"tab-specs\"\u003eSpecifications\u003c\/label\u003e\u003clabel for=\"tab-care\"\u003eCare\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spur-panels\"\u003e\n\u003c!-- DESCRIPTION PANEL --\u003e\u003cdiv class=\"tab-panel desc-panel\"\u003e\u003cp class=\"desc-intro\"\u003eThe Spark Pro is an ultralight down sleeping bag optimized for comfort and versatility, with the ability to open flat as a quilt when conditions warm up. It pairs high-lofting goose down with a draft collar and additional ventilation zippers, making it well-suited for shoulder-season and winter backcountry trips.\u003c\/p\u003e\u003c\/div\u003e\n\u003c!-- KEY FEATURES PANEL --\u003e\u003cdiv class=\"tab-panel key-panel\"\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eHighest Fillpower in the Spark Line\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eRDS-certified 900+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment delivers top-tier warmth-to-weight and loft recovery.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eFree-Flow Zip System\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eThree zipper points — main side, shoulder, and footbox — let you vent heat from the top, bottom, or sides, or open the bag flat as a quilt.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eSnag-Free Main Zipper\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eYKK #5 side zipper with zipper plow operates reliably even with mittens on in cold weather.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eStrategic Baffle Construction\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eVertical chest baffles lock in warmth where it counts; horizontal baffles in the lower half and base; full box-wall construction throughout for maximum thermal efficiency.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eFront Draft Collar\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eFitted at the neck and oversized across the shoulders to seal in warmth without restricting movement.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eGenerous Mummy Cut\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eA roomier shape than the standard Spark gives you space to shift and sleep on your side, without carrying the weight of extra fabric.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003ePairs with Women's Spark\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eZips together with a Women's Spark to share warmth across a couple's quilt-and-bag setup.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS PANEL --\u003e\u003cdiv class=\"tab-panel specs-panel\"\u003e\n\u003cdiv class=\"spec-category\"\u003eTemperature Variants\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F \/ -1°C\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eRegular · Long\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F \/ -9°C\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eRegular · Long\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eWeight (Total)\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e619 g \/ 21.8 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e672 g \/ 23.7 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e784 g \/ 27.7 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e861 g \/ 30.4 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eFill Weight\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e310 g \/ 10.93 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e356 g \/ 12.56 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e480 g \/ 16.93 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e504 g \/ 17.78 oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eCompressed Volume\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e5.3 L\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e5.5 L\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Regular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e7.0 L\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Long\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e7.7 L\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eTemperature Rating (ISO Lower)\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e30°F Variants\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e-1°C \/ 30°F\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e15°F Variants\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e-9°C \/ 16°F\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eRecommended User Height\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eRegular\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eup to 185 cm \/ 72.8 in\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eLong\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eup to 198 cm \/ 78.0 in\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eMaterials\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eShell\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% Nylon (10D, non-PFAS DWR)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eLining\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% Nylon (10D, breathable)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eInsulation\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eRDS-certified 900+ Fillpower Goose Down, 90\/10, non-PFAS Ultra-Dry Down treated\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eStuff Sack\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% Nylon (excluding trims)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eZippers\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eYKK #5 main with plow; YKK #3 footbox and shoulder\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eWhat's Included\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eIn Box\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eCompression stuff sack, storage cube\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CARE PANEL --\u003e\u003cdiv class=\"tab-panel care-panel\"\u003e\n\u003cp\u003eStore uncompressed in a dry, breathable bag between trips to preserve down loft.\u003c\/p\u003e\n\u003cp\u003eSpot-clean the shell with mild down-safe soap; air dry thoroughly before packing.\u003c\/p\u003e\n\u003cp\u003eFor full washes, use a front-loading washer on gentle cycle with a down-specific detergent; tumble dry on low heat with clean tennis balls to break up down clumps.\u003c\/p\u003e\n\u003cp\u003eAvoid prolonged direct sunlight and high heat to protect the DWR treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv id=\"torrent-scanner-popup\" style=\"display: none;\"\u003e\u003c\/div\u003e","brand":"Sea to Summit","offers":[{"title":"Beluga \/ -1C|30F Regular","offer_id":52743326695744,"sku":"101201","price":549.0,"currency_code":"USD","in_stock":true},{"title":"Beluga \/ -9C|15F Regular","offer_id":52743326728512,"sku":"101301","price":649.0,"currency_code":"USD","in_stock":true},{"title":"Beluga \/ -1C|30F Long","offer_id":52743326761280,"sku":"101202","price":579.0,"currency_code":"USD","in_stock":false},{"title":"Beluga \/ -9C|15F Long","offer_id":52743326794048,"sku":"101302","price":689.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7487\/5549\/files\/101201_902dde51-d65a-44c0-b726-bf50eea8fc55.jpg?v=1783364429","url":"https:\/\/spokex.com\/products\/sea-to-summit-spark-pro-900-down-sleeping-bag","provider":"SX Collective","version":"1.0","type":"link"}