Extra Warmth When It’s Extra Cold. Fleece Has Many Of Wool's Qualities But Weighs A Fraction Of the Lightest Available Wool Fabrics. Used In Some Of The High-Performance Outdoor Clothing, Microfleece Is A Lightweight, Warm And Soft Fabric That Is Hydrophobic, Holding Less Than 1% Of Its Weight In Water Retaining Much Of Its Insulating Powers Even When Wet. Machine Washable And Dries Quickly, Fleece Is A Good Alternative To Wool Particular To Those Who Are Allergic Or Sensitive To Wool.