7 Days Left to Get It by 12/24! See Details >
Home Page

Detail Images

  • Sea To Summit - Detail
  • Sea To Summit - Front
  • Sea To Summit - Detail
  • Sea To Summit - Detail
  • Sea To Summit - Spark SpII Sleeping Bag: 28 Degree Down
  • Sea To Summit - Spark SpII Sleeping Bag: 28 Degree Down - One Color
  • Sea To Summit - Detail -
  • Sea To Summit - Front -
  • Sea To Summit - Detail -
  • Sea To Summit - Detail -
  • Sea To Summit - Spark SpII Sleeping Bag: 28 Degree Down -

Current Color

  • Sea To Summit - Spark SpII Sleeping Bag: 28 Degree Down - One Color

Sea To Summit Spark SpII Sleeping Bag: 28 Degree Down

$369.95

Free 2-Day shipping on orders over $50. Learn More

Select a Size:

Select options
  • Select options
    • Long

    Select a Color:

    Select options
  • Select options
    • One Color

    551

    1 Review

    Details

    Spark SpII Sleeping Bag: 28 Degree Down

    The Sea to Summit Spark SpII Sleeping Bag is ultralight for backpackers, racers, bicyclers, and alpine climbers. Primarily focusing on giving you the lightest bag out there, Sea to Summit stuffed the Spark with 850-fill down for the best possible warmth-to-weight ratio. This bag's nylon shell is windproof and prevents the down from breaking through, and the smooth nylon lining adds some durability. Going beyond an ultralight design, Sea to Summit added its Ultra-Dry Down treatment to help this bag resist moisture and enhance your comfort regardless of the conditions.

    The Spark SpII has a contoured mummy shape to closely fit your body while you sleep. Its full hood wraps around your head to eliminate the possibility of waking up with freezing ears, and the 1/2-length zipper on the left helps maximize warmth. The Spark compresses small so that you're able to stuff your pack with a few extras even if you are a minimalist.

    • Lightweight and compressible sleeping bag for alpine adventures
    • Contoured mummy shape is roomy while maintaining thermal efficiency
    • Ultra-Dry Down resists moisture for warm sleep in wet conditions
    • Lightweight nylon shell is highly compressible for easy packing
    • Vertical baffles in torso area boost warmth around your core
    • Horizontal baffles in lower body area minimizes the bag's weight
    • Draft tube prevents heat from escaping through the side zipper
    • 1/2-zip with 2-way zipper allows quick ventilation on warmer nights
    • Item #STS006Z

    Tech Specs

    Material
    [face fabric] 10D nylon, [lining] 7D nylon
    Insulation
    RDS 850+ Loft Premium Goose Ultra-Dry Down
    Shape
    contoured mummy
    Zipper
    half-length
    Max User Height
    [regular] 6ft, [long] 6ft 4in
    Shoulder Circumference
    [regular] 59in, [long] 62in
    Hip Circumference
    [regular] 51in, [long] 54in
    Foot Circumference
    [regular] 35in, [long] 58in
    Draft Tube
    yes
    Venting
    two-way zipper
    Fill Weight
    [regular] 10.6oz, [long] 12.2oz
    Degree
    28F
    European Norm Comfort Rating
    35F
    European Norm Lower Limit Rating
    28F
    Storage Sack
    storage cell
    Stuff Sack
    Ultra-Sil compression bag
    Claimed Weight
    [regular] 1lb 1.3oz, [long] 1lb 3.8oz
    Recommended Use
    backpacking, mountaineering
    Manufacturer Warranty
    lifetime

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Great Down Sleeping Bag

    • Familiarity: I've used it several times

    I took this bag bikepacking and it was exactly what I wanted - packable, extremely light, and most importantly, warm. It packs down extremely small (just gotta work it into the smaller stuff sack, starting with the wider part) - not much bigger than a Nalgene bottle, and very light (just over a pound!)
    Just make sure to add ten degrees to the rated temperature - that's closer to the comfort level of the bag. For instance, this bag would actually be best in 35 degrees as the coldest temperature, otherwise it would be a tad chilly!
    A care suggestion, especially for an extremely light down bag like this, would be to keep it unpacked as much as possible. Once you get to camp, unfold this baby so it has time to decompress otherwise it's really wrinkly and lacks volume, which decreases insulation.
    Can't think of any cons to this bag - the zipper worked great, the mummy design fit me comfortably, and basically the bag performed as expected. Super satisfied!