{"product_id":"sea-to-summit-spark-ultralight-down-sleeping-bag-45-f-regular-lightweight-warmth-for-backpacking","title":"Sea to Summit Spark Ultralight Down Sleeping Bag 45°F (Regular) – Lightweight Warmth for Backpacking","description":"\u003ch2\u003eSpark 45°F Ultralight Down Sleeping Bag by Sea to Summit (Regular)\u003c\/h2\u003e\n\u003cp\u003eMeet the Spark 45°F Ultralight Down Sleeping Bag from Sea to Summit, engineered for warmth on the trail without weighing you down. This technical bag blends high loft down with an ultra-light shell to deliver an impressive warmth-to-weight ratio, making it a strong companion for warm-weather adventures. The insulation uses 850+ fill power down that is responsibly sourced and treated with Ultra-Dry Down, helping it respond to moisture while keeping loft intact through damp nights. It’s designed to compress small in your pack, so you can travel lighter without sacrificing comfort on cool evenings.\u003c\/p\u003e\n\u003cp\u003eThe Spark is built with practicality in mind. A contoured mummy shape provides a natural sleeping position, while sewn-through construction keeps weight low. The outer fabric is a 10D nylon shell with a PFC-free DWR finish that adds water resistance without sacrificing breathability. A left side YKK #5 zipper runs along a third of the bag length for snag-free entry and exit, making late-night breaks and early starts smoother. The result is a compact, efficient bag that travels well and settles in as a dependable warm-weather option for hikers, cyclists, and tourers alike.\u003c\/p\u003e\n\u003ch3\u003eMaterials, performance, and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh loft 850+ fill power down with Ultra-Dry treatment for moisture resistance and loft retention\u003c\/li\u003e\n  \u003cli\u003eUltralight 10D shell and liner with a PFC-free DWR to improve water resistance while staying breathable\u003c\/li\u003e\n  \u003cli\u003eContoured mummy shape for a natural sleeping posture and efficient heat retention\u003c\/li\u003e\n  \u003cli\u003eLightweight sewn-through baffles reduce bulk while maintaining loft and warmth\u003c\/li\u003e\n  \u003cli\u003eLeft side YKK #5 zipper provides reliable, snag-free entry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOn the trail and packing smart\u003c\/h3\u003e\n\u003cp\u003eTwo sizes are available: Regular for up to six feet in height and Long for up to six feet six inches, ensuring a comfortable fit for a wide range of hikers. The Spark includes an Ultra-Sil compression sack and a storage cube, aiding packability and organization. Sea to Summit backs its products with a lifetime guarantee against materials or workmanship defects, adding peace of mind for frequent travelers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo size options to fit a range of athletes and sleepers\u003c\/li\u003e\n  \u003cli\u003eUltra-Sil compression sack and storage cube for compact packing and quick organizing\u003c\/li\u003e\n  \u003cli\u003eRDS certified down with Ultra-Dry treatment for reliable performance in variable conditions\u003c\/li\u003e\n  \u003cli\u003eLifetime guarantee from Sea to Summit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor best results, allow the bag to loft fully in free air after use and store loosely rather than keeping it tightly compressed for extended periods. While the Spark is optimized for mild nights, its thoughtful construction keeps you comfortable when temperatures dip unexpectedly on shoulder-season trips. This bag isn’t a guarantee of warmth in extreme conditions, but it offers a credible warmth-to-weight balance for those prioritizing packable, reliable performance on the trail.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What environments is the Spark 45°F bag best for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Great for warm-weather backpacking, bike packing, and touring, with a light, compact design for mild nights.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What makes the Spark 45-Degree bag durable and easy to use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: RDS down with Ultra-Dry treatment, sewn-through baffles, a left-side snag-free YKK zipper, plus an Ultra-Sil sack and storage cube for packing ease.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sea to Summit","offers":[{"title":"Default Title","offer_id":41896983887952,"sku":"B0CTD455LJ","price":697.96,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/9645\/8576\/files\/sea-to-summit-spark-45-degree-down-bag-regular-setup.jpg?v=1765493484","url":"https:\/\/canadawildco.com\/products\/sea-to-summit-spark-ultralight-down-sleeping-bag-45-f-regular-lightweight-warmth-for-backpacking","provider":"Canada WildCo. | Hunting Gear, Fishing Equipment \u0026 Outdoor Essentials for the Canadian Wild","version":"1.0","type":"link"}