The Spark Ultralight Mummy Sleeping Bag series offers a wide range from an ultralight down liner to a mid-winter fast-and-light sleeping bag. Crafted with premium materials and a no-frills design, these bags deliver top-notch performance. Despite being ultralight, they're not overly tight, offering enough space for backcountry users. Key features include ULTRA-DRY 850+ Loft 90% Down Cluster Premium Goose Down certified by the Responsible Down Standard (RDS). The 10D shell and 7D liner materials make it incredibly lightweight and compact. It comes with a lightweight Ultra-Sil compression bag and storage cell. The zipper length is trimmed to save grams: 10°C, 5°C, and -2°C models have 1/3-length zippers, while -8°C and -15°C models have full-length side zippers. The baffle construction varies by temperature rating: 10°C and 5°C have sewn-through construction, -2°C has baffles in the torso and sewn-through in the leg area, and -8°C and -15°C are fully baffled. The shape also varies: 10°C, 5°C, and -2°C are contoured mummies, while -8°C and -15°C are broader mummies. Ideal for ultralight backpacking, it has a left-side #3 YKK zipper and an ultralight 10D nylon shell.
Using your Sea to Summit Spark Down Sleeping Bag is easy. Just unzip the Ultra - Sil compression bag and shake out the sleeping bag to fluff it up. Then, simply crawl inside and zip it up. When it comes to temperature, choose the right model according to the weather forecast. For warmer nights, the 10°C or 5°C models are great, while for colder nights, go for -8°C or -15°C. To keep your sleeping bag in good condition, always store it in the provided storage cell when not in use. Avoid storing it compressed for long periods as it can damage the down. When it gets dirty, follow the care instructions on the label. Usually, it's best to use a gentle detergent and a front - loading washing machine on a delicate cycle. Let it air dry completely and fluff it up again before storing. And remember, keep it away from sharp objects to prevent tears.
