Polartec Power Shield is the original soft shell fabric technology that combined breathable comfort with high performance weather resistance.  This family of  fabric styles has a nylon or polyester face that is water repellent, wind resistant and durable. The interior is finished with an insulating layer of fleece (high loft, classic or micro) or Power Dry. Power Shield fabrics block 98% of the wind while allowing some air movement for increased breathability. Power Shield Lightweight is our lightest style as the back fabrics are either lightweight Power Dry or microfleece. These make great summer shell jackets or can be used in a layering system when the weather gets colder.