Criterion Quantum 350 Goose Down Sleeping Bag


Criterion Quantum 350 – An ultralight, 695-gram Polish goose down sleeping bag with a Leeds comfort temperature rating of -6c.



The Quantum 350 is an ultralight goose down sleeping bag that offers a comfort rating (the one that matters) of -6c.

It’s filled with arguably the most efficient down in the world, Polish goose down with a fill power of 850.

And it’s not just the down that makes these Quantums have an amazing ‘comfort temperature rating to weight ratio’. Instead of sewing through like most coats, or having a box construction like most sleeping bags, they have a trapezoid construction which, although a complicated process, helps the heat stay in and the cold air out.

The neck baffle feels great when you’re cocooned within, stopping the warm air from escaping. Even the zip has an insulating baffle and the drawcord for the cowl hood and baffle is one simple cord.

Criterion bags have always had a Pertex Quantum shell. This down-proof material feels lovely to touch but is also super ultralight and hardwearing.

Criterion Quantum 350 Sleeping Bag Open
Criterion Quantum 350 Sleeping Bag Open
  • Leeds Comfort Rating: -6c
  • Weight: 695 grams
  • Fill: 350 grams of 850 fill power Diamond Grade Polish goose down (ethically sourced)
  • Inner and outer shell: Water repellent Pertex Quantum
  • Trapezoid construction
  • Full length YKK two-way zip
  • Top/bottom down ratio: 60/40 (so there’s more down on top where you need it)
  • Maximum user height: 1.85m (6ft)
  • Width at shoulders: 750mm
  • Packs to 120 x 120 x 270mm
  • Hanging loops on the bottom
  • Internal pocket
  • Comes with a stuff sack and a lofting net bag

All in all, an awesome ultralight sleeping bag that doesn’t fill your rucksack.


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Criterion Quantum 350 Goose Down Sleeping Bag Cover
Criterion Quantum 350 Goose Down Sleeping Bag