OMM Classic 32L backpack for walking, backpacking and running
OMM’s 32 Classic rucksack during a descent of Ladhar Bheinn, a Munro in the West Highlands of Scotland.
I’ll admit I own a lot of backpacks. Winter packs. Summer packs. Lightweight packs. Expedition packs. Running bags and vests. Even camera-specific backpacks. My desire has always been for one rucksack that would suit every activity but I'm realistic enough to know that's not going to happen.
The Original Mountain Marathon OMM Classic 32L pack is one example of a rucksack I own. Paired with a Lowepro Toploader AW75 camera bag, it quickly became my 'go-to’ option for outdoor adventures until an Ultimate Direction Fastpack 25 took over.
What I like about the OMM Classic 32L backpack
Size and 'cinchability' - At 32 litres, it holds a lot, despite weighing only 700g. On a recent camping trip to a mountain summit, I used it to carry a tent, a 3-season sleeping bag and a sleeping mat. I then removed everything but the safety essentials and was able to cinch it down well enough to go for a mountain run.
Waist belt pockets - These make a difference for me. The OMM hip pockets are nice and large and you don't have to struggle to get your fingers into them, as with some packs. I stuff the pockets full of snacks so I can graze all day in the mountains and ensure there's no energy bombs.
Functionality - I wasn't initially convinced that the main closure strap on the OMM 32L backpack - which enables access into the main compartment without unclipping it - is any better or quicker than a traditional buckle. When you want something quickly out your pack though, it's really handy (as is the large, stretchy mesh front pocket). The pack has a removable sit/sleep mat (which doubles as the padding for your back - a great idea but don’t expect to be too comfy if you use it for sleeping on) and it's compatible with a hydration pouch. OMM also gives you the ability to attach items to the outside of the pack (e.g. ice axes), using what they term a Universal Gear Rail.
What I'd change
Not much. Despite on paper being too short for me (50cm back length and I'm 6'2" tall), it's super comfy, even fully loaded. My only gripe would be the mesh material used for the front/side pockets is not very robust. It's only been used to hold soft materials such as hats, gloves and water bottles but the mesh has torn with what I'd class as minimal use. (Update - I've also had stitching come loose on the mesh pockets). It's still plenty useable but I'd like to see stronger material being used for these high-wear areas.
The main pack materials however are very robust and, for me, the OMM Classic 32L mountain marathon / adventure racing sack appears to be a great balance of features versus weight versus comfort. I really like it and it's had a lot of use over the seasons.
Alternatives
OMM Classic 25 litre - A lower volume version of the Classic 32. Very popular with runners in mountain marathons.
Montane Trailblazer series - Used by Montane athlete Jenny Tough on at least some of her runs across the different continents
Silva Strive - Possibly too small at 23 litres (+3 litres) but it depends on your planned usage
Ultimate Direction Fastpack series - My current favourite pack is an older Ultimate Direction Fastpack 25 model, which is unfortunately now archived. I use it every single day.
3FUL Quidian Pro - One of the many cottage manufacturers of lightweight gear for backpacking. See also Atom Packs in the English Lake District.