Lowe Alpine Outer Limits

This duvet jacket weighs  646g; Polarguard 3D synthetic insulation; sculpted hem to improve freedom of movement; cavernous chest pockets; internal pocket; stuffsack supplied; fleece-lined collar; £20 lower in price than previously. But you may want a hood and adjustable cuffs.

Verdict: Buy it if you want a well-insulated duvet for winter use and prefer synthetic insulation to down for its performance when wet.