POLARGUARD® continuous filament insulation is the recognized industry standard for high-performance in insulated outerwear and sleeping bags. For over 30 years the POLARGUARD® family of insulation products has provided greater thermal efficiency, more loft and resiliency and unsurpassed durability than other synthetic products. With POLARGUARD® continuous filament insulation, sleeping bags and jackets will not develop thick or thin cold spots even after years of continued use.