OMM takes its name from the Original Mountain Marathon, an annual event (now with several spin-off editions around the world) which is a true test of endurance ability. It’s a two day trail running race around a series of checkpoints, but what makes it particularly tough is that you have to carry all your gear with you - tent, sleeping bag, the lot.

As such, you’ll massively appreciate any weight-saving you can make. Which is why all of OMM’s gear is designed to be as lightweight and as multi-functional as possible. The Mountain Raid sleeping bag picture here is a great example.

“The fill is particularly impressive as it retains its insulating properties even when it’s wet."

Well, we say sleeping bag. This is actually a jacket that attaches to a half sleeping bag at the bottom. The advantage of that of course is that if stops you having to pack a jacket and a sleeping bag as separate items, saving you weight. You’ll make further weight savings because all of this - both the jacket and the sleeping bag - are built seriously lightweight.

The sleeping bag is insulated with Primaloft Gold, a warm synthetic insulation. OMM have cut down still more weight by having thicker insulation at the top where it is needed most. The jacket itself is a stand alone product, sold separately. It has a windproof face fabric and, like the sleeping bag, uses Primaloft Gold as the insulating layer.

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The fill is particularly impressive as it retains its insulating properties even when it’s wet, which if you’re running the OMM, it almost certainly will be. Other features of the jacket include fleece lined pockets, a hood and a drawcord hem. All in all it’s an impressive solution for the ultra minimalist runner.

OMM Mountain Raid PA 1.0 Stats:

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Shot on location in Chamonix