It's made with hydrophobic down, which means it doesn't clump together if it gets wet from sweat or rain ... version for layering. Helly Hansen Verglas Down Jacket 2.0: in the field I've been ...

The Helly Hansen Odin Everdown jacket will set you back a hefty £400 ... but I found it quickly wets out in any real rain.

For a more breathable but still affordable rain jacket, we really liked the Helly Hansen Seven J Rain Jacket as well. Best long: Fjällräven Vardag Rain Parka If you're looking for a long ...