Oilskin coats are made from cotton covered in an oil and wax coating. Although the oil and wax makes the moncler sale online wind-resistant and waterproof, oilskin coats can still develop mold, mildew and stains that cause odors. Since these coats cannot be washed in a washing machine or dry cleaned, they must be washed by hand. The most effective way to remove odors is to clean off the dirt, grime or mildew causing the odors and reproof the coat.