This lightweight insulation piece provides an especially high level of breathability. Its soft and quiet face fabric and good air circualtion makes this suitable for a comfortable midlayer, yet wind resistance and water repellancy also makes for a comfortable outer jacket. This is a good option if you are concerned about weight and breathability but still in need of protection and insulation. It has a soft, lightweight mesh liner treated with Polygiene® antimicrobial, and Polartec Alpha 60 grams insulation. On a scale from 0 to 6: Windproofness 4 Waterproofness 2 Insulation 5 Breathability 4 Durability 3 Lightweight 4 WarmthToWeightRatio 5 Areas of use Backpacking, General outdoor use, Randonee, Casual use.