OMM
OMM Mountain Raid 160 Synthetic Sleeping Bag (Regular)
Best use
- Made for
- Backpacking and wild camping
- Also works for
- Bikepacking
Why these labels
- Backpacking and wild camping: The maker states this use, and the published specs do not rule it out.
- Bikepacking: Small enough for bike bags: packs to 2.8 litres
From the maker's stated use and the published specs.
- Summer wild camp: 7/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 4/10 UK hills in spring and autumn. Wind, rain, and nights near freezing. Capped at 4: needs warmth 7+ (comfort 0 °C or colder).
- Winter camp: 3/10 UK winter or high ground. Below freezing, strong wind, possibly snow. Below this trip's minimum: needs warmth 9+ (comfort -5 °C or colder).
- Weight: 10/10 How much it adds to your pack, compared with the whole market.
Lowest price we found
£199.99 at Ultralight Outdoor Gear
Go to Ultralight Outdoor Gear Compare 2 shopsMountain marathons, fastpacking and other trips where every gram counts and you can add clothes inside the bag
- Zip
- Half, right side
- Comfort
- Not published
- Limit
- Not published
- Fill
- synthetic
- Weight
- 450 g (Regular)
Packed size 2.8 L, 21 cm long and 13 cm across Compare with a 2-litre bottle
Shorter than a 2-litre bottle and a bit wider than one. Drawn to scale.
Where to buy
Ultralight Outdoor Gear £199.99 In stock. Free delivery. Regular and Extra Long both in stock. Shop lists RRP £219.99 and 414 g.
View at shop: Ultralight Outdoor GearOMM £220 In stock. Free delivery. Regular in stock. Postage £6 under £50, free over £50 (Royal Mail Tracked 48, 3-5 working days).
View at shop: OMMPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Warmth
Estimate from maker's specs: fill type and bag weight (no temperature rating published) 1/10How cold a night you can sleep comfortably through. 1: A real weak point.
Estimate from maker's specs
Room inside
Estimate from maker's specs: bag shape (fewer than 3 reviews about room) 3/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 3: Below average. Fine for some trips, not others.
No review we found says how roomy it is, so this is an estimate from the bag shape.
Weight
From maker's figures 10/10How much it adds to your pack. 10: The best you can buy for this.
OMM gives 450 g for the Regular, in the under 700 g band. One UK shop lists 414 g without the storage bag; OMM's figure is used.
Packed size
From maker's figures 10/10How much room it takes in your rucksack. 10: The best you can buy for this.
OMM gives a pack size of 21 x 13 cm but no volume. Read as 21 cm long and 13 cm across, it works out at about 2.8 L (3.1416 x 6.5 x 6.5 x 21 = 2,787 cm³), in the under 4 L band. Several UK shops copy an older 22 x 15 cm (about 3.9 L), which is in the same band.
In short
Good for
- Mountain marathons, fastpacking and other trips where every gram counts and you can add clothes inside the bag
- Minimalist campers who want a synthetic bag at 450 g that packs to about 2.8 L
- Summer and mild shoulder-season nights, with a good mat underneath
Strengths
- 450 g and about 2.8 L packed in the Regular, very light for a synthetic bag
- PrimaLoft Gold with Cross Core fill, mapped as 60 g/m² under the sleeper and 100 g/m² on top, so the weight goes where it insulates
- Windproof PointZero fabric inside and out, with a DWR finish on the outer
- Shaped footbox with extra 100 g/m² fill, and a half YKK zip offset to the right to cut weight and aid venting
Weaknesses
- Little insulation under the sleeper by design, so the mat does the work of keeping out ground cold
- Half zip only: shorter to get in and out of than a full-length zip
- No independent test of this exact bag found, so the damp, comfort and durability scores are 'Not enough evidence'
- OMM's pack size (21 x 13 cm) differs from the older 22 x 15 cm that many shops still copy
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.