We're working out what we think - we'll add our view here!
OMM says:
Like all OMM sleeping bags the Mountain Core 125 is made from a combination of materials to ensure maximum performance, the PointZero® shell, has a DWR treatment aid water repellency and Primaloft® NEXT insulation warm when wet technology. Utilising the soft textured Primaloft® NEXT fleece insulation on the inside increases wicking and improves comfort.
We're working out what we think about OMM's Mountain Core 125 Synthetic Sleeping Bag, we'll add our comments here in due course.