This fabric's raised surface structures are knit into a single fabric, forming individual pockets filled with air - Nature’s most efficient insulator.

POWER AIR is different from traditional fabrics that rely solely on mechanically-lofted (napped and sheared) yarns to trap and hold warm air. Polartec's unique construction contains these fibers within air pockets, providing added warming benefit, while reducing potential for shedding in the wash and over time.