A down gilet is an amazing layering piece. You can easily stuff it into a backpack when hiking, but as soon as you stop or the temperature drops, you can pull it on for instant warmth where you need it most. The Diablo Down Gilet does this in a lightweight package, thanks to its 700-fill of responsibly-sourced down. Combine it with a shell jacket and midlayer fleece for full weather protection when hiking.