For little weight or volume, you can add both warmth and insurance. These versatile windshirts are light and small enough to just throw into a daypack in case it gets colder or later than you anticipate. They've got good breathability so they can be used while exercising or while lounging around in camp or if you're cold and need another layer. One of my favorite pieces of clothing. I usually
This review was written in the old system and had content requirements that are different than reviews written today.