Criterion Ultralight 350 down sleeping bag


The Ultralight 350 is perhaps the perfect bikepackers bag. It’s light and highly packable but with a comfort temperature rating of -3°C, it can be used throughout most of the year. The shell is Pertex Quantum (52gms/m²) ripstop which is filled with 350g of high quality 700 FP Polish goose down. Trapezoid baffle construction helps eliminate any potential cold spots and promote maximum loft. A DWR+ treatment of the shell helps protect the down from any dampness or condensation.

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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