Fleece jackets are the standard in providing lightweight warmth and breathability. They are perfect as a layering piece in colder conditions, or as a simple jacket for cool temperatures. Some our favorites are the North Face Denali Thermal and the Patagonia Synchilla. Fleece jackets and fleece pullovers are universally loved and have become a staple in outdoor jackets and layering systems. This style of fleece traps the heat inside the jacket during windy situations, but still allows for breathability during aerobic activities.