Montane Prism

This duvet jacket weighs 372g; synthetic insulation; large chest pockets; hood rolls to collar; elasticated cuffs; scoop tail; excellent movement in sleeves; packs into its own pocket; ideal as back-up insulation from spring to autumn. But not as warm as others.

Verdict: Buy it if you want a very lightweight backup mid layer or windproof insulation layer for mild winter use.