Sea to Summit Spark Ultralight 18F Sleeping Bag

$479.00 to $499.00
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Designed for late spring to early fall use, the Sea to Summit Spark Ultralight 18F sleeping bag is an ultralight pick for ounce-counting backpackers. It serves up easy ventilation and cozy comfort.

  • Features

    • 850-fill-power down provides cozy warmth
    • Baffles in the torso area keep insulation in place; sewn-through construction in the leg area helps keep this bag lightweight
    • 10-denier shell and 7-denier liner materials deliver an impressively light weight and compact packed size
    • Full-length side zipper with 2 sliders offers easy ventilation options
    • Includes lightweight Ultra-Sil™ compression bag and storage cell

    Imported.

    Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Ratings are based on a person wearing one long underwear layer and a hat, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
    View all Sea to Summit Men's Sleeping Bags
  • Technical Specs

    Best Use

    Backpacking

    Tested Lower Limit

    18 degrees (F) - EN

    Tested Comfort

    29 degrees (F) - EN

    Temperature Rating (F)

    18 degrees (F)

    Temperature Rating (C)

    -8 degrees (C)

    Weight

    Long: 1 lb. 10 oz.

    Regular: 1 lb. 8 oz.

    Ultralight

    Yes

    Shell

    10-denier nylon

    Zipper Location

    Left

    Insulation Type

    Down

    Water-Resistant Down

    Yes

    Fill

    Ultra-dry down

    Fill Weight

    Long: 1 lb. 1.6 oz.

    Regular: 14.4 oz.

    Lining

    7-denier nylon

    Sleeping Bag Shape

    Mummy

    Fits Up To (in.)

    Long: 78 inches

    Regular: 72 inches

    Shoulder Girth (in.)

    Long: 64 inches

    Regular: 61 inches

    Hip Girth (in.)

    Long: 56 inches

    Regular: 53 inches

    Stuff Sack Size

    6 x 14 inches

    Stuff Sack Volume

    6 liters

    Compressed Volume

    Long: 5.4 liters

    Regular: 4.6 liters

    Gender

    Unisex

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