{"product_id":"sea-to-summit-spark-ultralight-1c-sleeping-bag-grey-yellow-745028","title":"Spark Ultralight -1C Sleeping Bag","description":"\u003cp\u003eThe Spark Ultralight Mummy Sleeping Bag Series is designed for every type of adventure—from lightweight liners for summer trips to warm, packable bags that will keep you cozy through chilly winter nights. Crafted with premium materials and a focus on performance, these bags simplify your experience without compromising on quality.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eUltralight does not mean cramped; the Spark’s snug mummy shape is engineered to retain heat while providing enough space for comfortable movement after a long day on the trail. It is ideal for fast-moving backcountry explorers who aim to carry no more than necessary.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e850+ FILL Power, RDS-certified\u003c\/li\u003e\n\u003cli\u003eGoose Down with Ultra Dry Down treatment for enhanced water resistance in damp conditions.\u003c\/li\u003e\n\u003cli\u003e10-Denier Nylon shell and lining.\u003c\/li\u003e\n\u003cli\u003e10-Denier Nylon waterproof-breathable hood and footbox.\u003c\/li\u003e\n\u003cli\u003eMummy Fit: Fitted cut with a generous footbox and technical hood, maximizing thermal efficiency while minimizing bulk and weight.\u003c\/li\u003e\n\u003cli\u003eSpark 7C\/45F \u0026amp; 1C\/30F Primary zip - 1\/2 length #5 with zip-plow and two sliders.\u003c\/li\u003e\n\u003cli\u003eSpark -9C\/15F \u0026amp; -18C\/0F Primary zip - 3\/4 length #5 with zip-plow and two sliders.\u003c\/li\u003e\n\u003cli\u003eVertical chest baffles, horizontal baffles, lower half, and base.\u003c\/li\u003e\n\u003cli\u003eSPARK 7C features sewn-through quilted construction throughout.\u003c\/li\u003e\n\u003cli\u003eSPARK -1C\/30F includes box wall baffles in the top half and sewn-through quilted construction in the lower half.\u003c\/li\u003e\n\u003cli\u003eSPARK -9C \u0026amp; -18C employs box wall baffle construction throughout.\u003c\/li\u003e\n\u003cli\u003eSpark 7C, -1C \u0026amp; -9C has a standard front draft collar.\u003c\/li\u003e\n\u003cli\u003eSPARK -18C includes double draft collars.\u003c\/li\u003e\n\u003cli\u003eSpark 7 \u0026amp; -1 cannot be paired.\u003c\/li\u003e\n\u003cli\u003eSpark -9 \u0026amp; -18: Pairs with Women's Sea to Summit bags.\u003c\/li\u003e\n\u003cli\u003eQuiltLock System integrates with StS quilts.\u003c\/li\u003e\n\u003cli\u003eBest Use: Ultralight Backpacking.\u003c\/li\u003e\n\u003cli\u003eComes With: Ultra-Sil compression bag and storage cell.\u003c\/li\u003e\n\u003cli\u003eInsulation: Ultra-Dry Goose Down 850+ Loft.\u003c\/li\u003e\n\u003cli\u003eMaterial(s): 10-Denier Nylon shell and lining, 10\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Grey \/ One Size","offer_id":53571242361162,"sku":"003737355","price":319.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/8836\/8714\/files\/bl_745028_a.jpg?v=1767916089","url":"https:\/\/www.blacks.co.uk\/products\/sea-to-summit-spark-ultralight-1c-sleeping-bag-grey-yellow-745028","provider":"Blacks","version":"1.0","type":"link"}