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). This fabric blocks 98% of the wind while allowing some air movement for increased breathability. Power Shield High Loft is our warmest style as the large air pockets created by the extended fleece fibres retain optimal warmth to provide the highest warmth to weight ratios of all of our Power Shield fabrics.

High-Loft is basically a pile (fur-like) backing that traps air against the body, creating an extra layer of insulation. It will not keep you warm in -22 degrees...that requires something with insulation (see Polartec® Alpha)

For very cold climates it's a perfect fall fabric, and for milder climates like the west coast of Canada, or the Pacific Northwest (Washington) it's perfect for winter.