Sea To Summit

Sea To Summit Spark 3 SPIII Down Sleeping Bag

$393 $491

Sea To Summit Spark 3 SPIII Down Sleeping Bag


Designed to maximise warmth and minimise bulk, the Spark Series offers a range of sleeping bags ideal for any climate, from ultralight liner to winter-ready expedition weight bag. All reflecting a philosophy of utilising the lightest bag possible while still providing suitable protection from the elements. Premium RDS 850+ Loft goose down, #3 YKK zip, 10D Nylon shell, and 7D lining fabrics have all been strategically chosen for maximum performance. Through insulative materials and a contoured mummy shape, Sea To Summit provides a snug fit combined with efficient insulation. Every model is modified to optimise it for its intended use. The ULTRA-DRY Down™ treatment has been applied to the down insulation, providing protection from external moisture and mitigating any impacts from internal condensation. All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The ULTRADRY Down™ protection also makes the Spark™ an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option

Sea To Summit Spark 3 SPIII Down Sleeping Bag Features

  • Ultralight 7D and 10D fabrics for minimal weight and packed size
  • RDS 850+ Loft Premium Goose ULTRA-DRY Down™ for maximum insulation value
  • Contoured mummy shape for comfort and efficient insulation
  • Vertical chest baffles prevent down migration and cold spots
  • Vertical box baffles in the torso area accommodates extra down and boosts warmth around the core, vertical baffles on chest optimises positions of down to prevent it moving during use
  • Lower part of the bag uses a sewn through horizontal baffle construction to minimise weight
  • ½ zip with two sliders aids access and allows ventilation from mid-section of bag
  • Draft tube prevents heat loss through the zipper
  • Includes hood draft collar
  • Includes lightweight Ultra-Sil™ Nano compression bag for compact storage

Sea To Summit Spark 3 SPIII Down Sleeping Bag Specifications

  • EN13537 Temp rating

    - Comfort               -2°C | 28°F

    - Lower Limit         -8°C | 9°F

    - Extreme             -26°C | -15°

  • Compression sack size  (upgrade to a waterproof sack here)     X Small         (6L TO 2L)

  • Dimensions (CM)

    -Long        227 X 89    

    -Regular  212 X 83

  • Fill weight  

    -Long  485g

    -Regular 430g

  • Internal chest circumference    

    -Long 162CM

    -Regular 155CM

  • Internal hip circumference       

    - Long 142CM

    -Regular 145CM

  • Recommended user height      

    -Long up to 198CM

    -Regular up to 183CM

  • Weight         

    -Long 745g

    -Regular 665g

Customer Reviews

Based on 2 reviews
Larissa Smith
Perfect gift for a hard to buy for Dad

For once my husband told me he wanted a sleeping bag for Father’s Day but not just any sleeping bag…one he could use while running/camping in the bush lots of criteria for weight, comfort etc. I didn’t know when to start and went to PAST outdoors for help. I got great service and great advice. They knew right away what I needed - apparently running/camping is a thing! They showed me options talked through pro/cons and took lots of time to help me get the right one. Highly recommend for anyone looking for the right gear to enjoy time outside doing whatever you love.

Michelle Zammit
SEA TO SUMMIT SPARK SPIII - 2019 - Sleeping soundly!

Deliberated about upgrading to a new bag for ages, wish I had done it sooner. This bag not only feels great, but is light, zips easily and packs well. I would recommend this product.

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