There are now two Moutain Raid bags in the OMM range.
OMM suggest this 1.0 model is for 2/3 season use. Recent comments on-line would appear to suggest 1/2 season, as the bag is also aimed at the travelling market.
I haven't tried it in anger myself, however I can tell you that it isn't suitable for anyone over 6 foot tall. At 6' 2" the material is under tension at the head and foot and that would be the last thing you need if you're trying to trap air and make maximum use of the 100g Primaloft.
The zip is not on the side, but slightly offset across the chest. There isn't any neck baffle, which all of course makes it able to be compressed down to a ridiculously small pack size as shown in the photo.
I would advise this to be ideal if you have additional clothing layers for insulation to wear inside the bag. Experienced OMM Adventure Marathon users will be very interested in this, as it will still perform even if wet or damp. However for comfort and safety, I would certainly err on the side of caution if it was predicted to be a cold night.
Better still test it in the garden before you commit yourself to a night on the fells!
Both these bags can be 'uprated' using the new Thermartex Heat Reflective blanket, which is a very light and compact way to add more warmth in the unpredictable Adventure Racing weather.
The packed size is 19cm x 11cm (Dia) compared to the Mountain Raid 1.6 at 22cm x 12cm (Dia).
Specifications Stitched through inner with loose laid outer Short 1/4 YKK zip with locking runner Mummy Shape Hood Drawcord Fast Drying easy care Insulation: Primaloft One Weight: 380g Fabric: PointZero outer, Primaloft One 40g & 60g fill Dimensions: Length 205cm, shoulder width 65cm, foot box 25cm. Packed size: 19cm x 11cm Colour: Black
Manufactures comments The aim with the Mountain Raid was to design the bag which you would want to use when running on the OMM or other events/activities where weight vs. performance was critical. We wanted it to be warm enough for practical use, lightweight, have good performance and be compact.
It is the purist bag for the minimalist with Primaloft One® PL1 and Pertex Quantum a winners combination. The bag weighs 400g and stuff's down to the size of a Grapefruit, combining loose laid Pertex Quantum over 60g Primaloft One synthetic insulation on top and 40g Primaloft One synthetic insulation on the bottom, it features a full foot box with external hangtags to dry/air and has a cowled hood to keep your head warm with a offset 1/4 zip with again a P1 insulated baffle to protect against cold.
The bag also doubles up as a safety/emergency bag to carry with you at all times on the Mountains and in the Wilderness.
Short Zip with double runner
Stitched through inner with loose laid outer
Fast drying easy care
Hang tags at base
Total Weight 400g (inc.stuff sac)
Shoulder Width 65cm
Foot Width 35cm
Pack Size 20 x 15 cm
Construction insulation stitched to liner with loose laid outer
Shell Fabric Pertex Quantum®
Filling Quality Primaloft One PL1® 60g top, 40g base
The great thing about this sleeping bag is it's weight and size (I didnt find much close to this for the same price). I used it fastpacking and both of those were of utmost importance. As a summer bag it's perfect but it would be a bit cold to use at other times of the year. For me, and what I was using it for, it was spot on.
OMM have innovated and produced a light weight and durable 2 season sleeping bag. I used it with a silk liner on a wild camp high in the Lakes and had a comfortable nights sleep. The hood was well fitting and I found the central zip easy to use for getting into/out of the bag. I also plan to use it as a liner inside my winter bag for end of year bivy trips.