ARC’TERYX PROTON LT HOODY £220

This lightweight, breathable jacket is one of those great bits of kit you can put on when you’re cold, then leave on when you start moving. The Fortius Air 20 outer fabric has proved durable enough for us on winter mountain trips, with the Coreloft Compact 80 insulation providing excellent warmth without burning you up on long ascents. It also packs down small and weighs less than 400g, so is easy to stash in your pack when not needed.

VERDICT Lightweight insulation to keep you moving in winter, whether you’re walking, scrambling or climbing.