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Sleeping Bags

Sea to Summit Spark Ultralight 5F

Introducing the Sea to Summit Spark Ultralight 5F, a groundbreaking sleeping bag designed for those who push the limits of outdoors exploration and demand the highest level of performance. With its exceptional lightweight construction and excellent insulation capabilities, the Spark Ultralight 5F is the perfect companion for cold-weather adventures.

One of the most striking features of this sleeping bag is its weight. Weighing in at just under one pound, the Spark Ultralight 5F is an impressive achievement in ultralight design. The use of premium materials, such as high-quality 10D fabric and highly compressible 850+ loft down, allows for a significant reduction in weight without compromising on warmth or durability. This makes it an ideal choice for backpackers, mountaineers, and other minimalist adventurers who need to carry their gear over extended periods of time.

Despite its lightness, the Spark Ultralight 5F offers exceptional insulation properties. The bag boasts a comfort rating down to 5F, making it suitable for use in cold climates and during winter camping expeditions. The advanced design features a box-wall construction, which minimizes heat loss and creates a consistent layer of warm air around the body. Additionally, its tight-fitting mummy shape and anatomically-shaped foot box ensures maximum thermal efficiency and prevents heat from escaping, providing a cozy and comfortable sleep experience even in freezing temperatures.

One of the challenges with lightweight sleeping bags is ensuring their durability and resistance against wear and tear. With the Spark Ultralight 5F, Sea to Summit has utilized innovative technologies to overcome this challenge. The bag features a 20D fabric on the upper and lower to provide excellent tear resistance and a DWR (Durable Water Repellent) treatment, protecting against moisture and condensation. Furthermore, the premium 850+ loft down used in the bag is treated with a highly-effective antimicrobial treatment, which prevents the growth of bacteria and extends the life of the sleeping bag.

The Spark Ultralight 5F also excels in terms of versatility. Its design includes a full-length side zipper, allowing for easy entry and exit and facilitating ventilation options. The zipper has been carefully designed to minimize weight while providing smooth operation and ultimate convenience. Additionally, the bag can be compressed into a remarkably compact size and stored in the included Ultra-Sil compression sack, ensuring that it takes up minimal space in your backpack and leaving plenty of room for other essential gear.

Comfort is not compromised in the Spark Ultralight 5F either. The bag’s anatomical shaping and hood design ensure increased comfort and warmth, while the oversized draft tube located alongside the zipper prevents cold air from sneaking in and causing discomfort during the night. The inclusion of an adjustable neck collar also provides additional thermal efficiency by reducing heat loss through the opening.

Furthermore, the Spark Ultralight 5F is part of Sea to Summit’s Responsible Down Standard (RDS) certified products, ensuring that the down used in the bag is sourced ethically and sustainably from farms that prioritize the welfare of the animals. With this certification, you can have peace of mind knowing that your purchase supports responsible practices within the industry.

In conclusion, the Sea to Summit Spark Ultralight 5F is a true game-changer in the realm of lightweight sleeping bags. Its ultralight design, exceptional insulation, and durability make it a standout choice for outdoor enthusiasts who prioritize weight reduction without compromising on performance. With its extensive features and comfort-oriented design, the Spark Ultralight 5F is undoubtedly a remarkable achievement in sleeping bag technology, setting the standard for cold-weather exploration.

Read more about Sea to Summit Spark Ultralight 5F at Find the specs, the best price, and compare it to other similar products.


Weight 1 lbs 15 oz
Product Brand Sea to Summit
Sea to Summit Sleeping Bags

Added: September 19, 2023

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Sea to Summit Spark Ultralight 5F

Sea to Summit Spark Ultralight 5F

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