THE NORTH FACE Thermoball Micro-baffle Insulated Puffer Boots Sz 8 Excellent gently used condition. These have a few marks around the toes, still in great shape! FROM WEBSITE: Unlike most companies that stuff their bulky products with continuous filament synthetic insulation, The North Face, in partnership with PrimaLoft, has developed a brand new cluster insulation for their Women's Micro Baffle Bootie. Tested by Kansas State University to offer as much warmth as 600-fill goose down, this revolutionary technology has been named ThermoBall. As a result, the Micro Baffle offers the light weight, loft, warmth and comprehensibility of down with the wet- weather insulating performance of synthetics. A recycled PET ripstop shaft and faux fur add to the apparent luxury of this useful boot. An EVA-molded TNF Winter Grip with IcePick lugs provide top quality grip on even the slickest of surfaces.