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Load image into Gallery viewer, Spark Spi
Load image into Gallery viewer, Spark Spi
Load image into Gallery viewer, Spark Spi

Spark Spi

Regular price $599.00
Sale price $599.00 Regular price
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This is a pre order item. We will ship it when it comes in stock.

A game changer for modern alpine climbing or fast and light hiking, running or adventure travel. No need to contemplate cutting weight by sharing a sleeping bag with your climbing partner who hasn't showered in a week, the Sea to Summit Spark series of bags are contenders for the best warmth to weight ratio of bags on the planet and specifically target those people who need to shed every gram and would possibly consider not taking a bag at all.

The Spark SpI uses the highest possible quality of responsibly-sourced down, 850+ loft, Ultra-Dry water repellent European goose down, and an ultra-thin 10D nylon shell. It's no slouch in the design department either: the mummy shape, full hood and short zip conserve heat efficiently, and vertical chest baffles prevent migration when horizontal. Even better - it's so thin it can be used as a liner or booster bag to add several degrees to your other bags. Talk about versatility. All this and it fits in the palm of your hand. Comes with compression sack and storage cell.

Because the bag is quite slim cut, it can also double as the world's best liner bag to boost another sleeping bag for extreme cold conditions. Updated for 2019, Sea to Summit's Spark series of sleeping bags are designed to be the pinnacle of lightweight warmth for any conditions - an ultralight down bag for travellers, adventure racers and minimalists of all persuasions.

Sea To Summit Spark SPI Sleeping Bag Features

  • Contoured mummy shape
  • 1/3 length side zip which saves weight and boosts warmth (this does mean however that it cannot be opened up like a blanket)
  • 10D Pertex Quantum shell
  • 850+ European Goose down with DWR (Durable Water Repellent) Treatment
  • Fill weight of 400g for Regular
  • Box wall baffled construction


    Read our staff review > 

    EN13537 Rating: +9°C to +5°C
    Shell: 7D & 10D Nylon Shell; Sewn Through Construction
    Down: Responsibly-Sourced 850+ Loft Ultra-Dry Goose Down
    Down Distribution: 55/45 (top/bottom)
    Packed Volume: 3.7L
    Shape: Mummy
    Fill Weight: Regular - 180g, Long - 205g


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