OMM Duomat 45 folding sleeping mat is a leanweight insulation matt, that covers you from hip to shoulder. Closed cell foam with a non slip upper surface, two joined together can make a full length matt or they can be doubled up as extra padding.
This 3 fold 4 section mat extending to 80cm long is supplied in place of Sitmat in upgraded Classic Marathon 25L Classic Marathon 32L and Jirishanca 35RL.
`I took an OMM Duo Mat to use as a sit mat and under my feet on cold wet ground in the tent. At 143 grams it added little to my load and having a dry seat was very welcome during the wet weather.` - Chris Townsend TGO Magazine.
Thickness of the folded mat is about an inch so you can imagine that the pad is very thin so its designed for insulation and only minimal comfort support.
This will suit many ultralighters others will use an inflatable pad and carry the extra 200g (minimum) for the extra comfort.