You've got the right insulation. You've paid for waterproofing. You've checked fit and wind resistance. Then you're standing in -5°C on a ridge, and—despite everything—you're freezing. The culprit? An ordinary collar that lets cold air circulate directly around your neck. Research on thermal ...

You see "box wall" and "stitch-through" on jacket spec sheets and assume they're just technical jargon. They're not. The difference between these two construction methods determines whether you'll have cold spots at seams or even warmth across your jacket—and it accounts for up to 15% of your ...