Criterion Ultralight Down Sleeping Bags
Ultralight down sleeping bags, which pack down to almost nothing
Our Ultralight range consists of two lightweight down sleeping bags, both offer excellent warmth to weight ratios and small pack sizes. Available in two down weights(200g and 350g) and are ideal for fast and light backpacking, adventure racing and mountain marathons.
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Criterion Ultralight 200 Lightweight Sleeping Bag
£185.00 2 Season3°c620g This product has multiple variants. The options may be chosen on the product page -

Criterion Ultralight 350 Down Sleeping Bag
£220.00 3 Season-3°c765g This product has multiple variants. The options may be chosen on the product page
Criterion Ultralight Range Specifications
| Criterion Ultralight 200 | Criterion Ultralight 350 | |
|---|---|---|
| Construction: Top/Base: | Boxwall/Boxwall | Trapezoid/Boxwall |
| Down Quality/Type/Fill Power: | White Goose/ 92:8/ 700 | White Goose/ 92:8/ 700 |
| Down Weight: (gms) | 220 | 350 |
| Fill Volume(1):(cm3) | 5133 | 8167 |
| Total Weight:(gms) | 620 | 765 |
| Overall Length:(cm) | 217 | 217 |
| Max. User Height:(cm) | 185 (6′ 1″) | 185 (6′ 1″) |
| Width Shoulders/foot:(cm) | 75/50 | 75/50 |
| Colours: Outer/Inner: | black/electric blue | black/crimson |
| Comfort Temperature Rating:(°C) | +3 | -3 |
| Stuff Sack Size:(cm) | 11 x 11 x 25 | 12 x 12 x 27 |
Criterion Ultralight Range Features
Fast & Light, Race Ready
Designed to be fast and light and provide lots of insulation. Our Ultralight range is ideal for adventure races and mountain marathons. They are designed to be fast and light
700FP Ethical Goose Down
Fillled with RDS & Downpass certified 700 fill power ethically sourced polish white goose down with a down to feather ratio of 92:8.
Pertex Quantum 52 Shell
Pertex Quantum 52g/m² is the ideal shell the Criterion Prime range, offering a lighter weight branded rip-stop nylon fabric, which is ideal for use in mountainous terrains.
Other Criterion Ultralight Features
- Differential Fill and Cut – More down is placed in the top of the bag rather than the base. As your body heat rises extra down in the top of the bag ensures better insulation than if all the down was split equally. The down on the base of the bag traps some body heat and combined with a good sleeping mattress acts as a barrier, preventing heat being lost to the cooler ground. In our Traveller range of bags 60% of the down is in the top of the bag with 40% in the base.
- Trapezium Footbox – Trapezium Boxfoot – A trapezium is a four side regular shape but unlike a rectangle it only has one pair of parallel sides rather than two. Our boxfoots are wider at the base and taper to be slightly narrower at the top of the bag. This helps to suit all feet types and sleeping styles.
- Cowl hood – A spacious hood with one-hand-operated drawcord and plenty of room to turn you head.
- Full length YKK zip – A two-way YKK zip runs the full length of the bag. This allows venting from both the head and foot of the bag. All of our bags have a Velcro neck retainer so the bag can be closed even with the zip open.
- Full length insulated zip baffle- A down filled baffle runs the length of the zip in our Ultralight range.
- Choice of zip sides – Our Ultralight range is available with zips on both the left and right hand sides. Left and right handed zip models can be zipped together if required. All of our sleeping bags (with the exception of the Expedition range) can be zipped together with bags of different ranges.
- Inside pocket – A functional inside pocket allows the safe storage of valuables such as a wallet or phone.
- Hanging loops – Two hanging loops are fitted to the boxfoot of the bag which allows storage on a coat hanger or airing on a washing line.
- Stuff Sack and Mesh Storage Sack Included – All of our sleeping bags are supplied with a size-related stuff sack for use outdoors and a breathable, mesh storage bag for use at home if needed. We also offer a range of optional roll top dry bags for use as stuff sacks.

