Sitka Men's Timberline Pant
When you are traversing a ridge top where the wind chill is whipping 10 degrees Fahrenheit, you don't want to be lugging a bulky jacket for wind protection.  The Contrail Windshirt incorporates stitch-less/welded seams with an extremely breathable 4-way stretch fabric.  These features make it lightweight enough you will not even realize you are wearing it, while still being 100% windproof and durable.