Considering that Arc'teryx takes its name from the first reptile to develop the feathers for flight, we're hardly surprised by the Canadian brand's innovative outdoor garb. The packable Atom LT jacket, in particular, gets our attention, thanks to its insulation, breathability, and wind and weather resistance. The perfect cold-weather mid-layer or standalone during rest phases, it's quick-drying and retains warmth when damp, too.| Arc'teryx shell jacket100% nylon; lining 100% nylonZip fasteningRegular fit, hood, long sleeves, elasticated cuffs, foil-embossed branding at chest, two zip pockets at sides, contrast panels at sides, fully linedMachine wash coldSize medium: length 27in / 69cm, chest 42in / 107cmModel is 6ft 2in/1.88m and wears a size mediumMidweight, slight stretch