Criterion Quantum 350 down sleeping bag


The Quantum 350 is an extremely versatile ultralight sleeping bag and is also our most popular. It’s designed for true 3 season use and a comfort temperature rating of -6°C means this bag really is suitable for camping throughout most of the year in the UK. It weighs just 695 grams and packs to 12cm x 12cm x 27 cm which is quite some feat for a bag that will see many people happily through winter. It’s made using a Pertex Quantum (35gms/m²) ripstop shell and is filled with 350g of the highest quality 850 FP Polish goose down. Trapezoid baffle construction eliminates the potential for cold spots and provides maximum loft. A DWR treatment on the shell helps protect the down against condensation, drips or splashes.

NB: Sent via Royal Mail Special Delivery in UK. Contact us for overseas delivery costs on this item.

Click here to see a comparison table of the full Criterion sleeping bag range.



  • 350gms of 92:8 Polish goose down insulation with 700 fill power – collected in accordance with DOWNPASS ethical standards.
  • Fill volume: 8167 cubic inches.
  • Weighs: 765g.
  • Packs down to 12 x 12 x 27 cm.
  • Top side construction: trapezoid.
  • Comfort temp: -3°C.
  • Temperature rating confirmed by independent lab testing at Leeds University.
  • Length: 217cm.
  • Width shoulders / foot (cm): 75/50.
  • Max user height 6′ 1″ (185cm).
  • Anti-snagging, full length insulated zip baffle.
  • Full-length YKK two-way zip, with zip together compatibility (even different models).
  • Cowl hood and 1 hand operated drawcord.
  • Inside pocket & hanging loops.
  • Compact fully-featured stuff sack.
  • Mesh storage bag.


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Criterion quantum 200 down sleeping bag
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