CleanRest down-alternative comforters with MicronOne® fabric covers are the healthiest down-alternative comforters we offer. The MicronOne® fabric ensures you'll have a clean, healthy night's sleep every night. MicronOne® fabric creates a protective barrier between you and allergens that can negatively affect your sleep. The cover stops all micro-toxins larger than one micron in size, including dust mites, mold spores, pollen, pet dander and bed bugs, from coming into contact with you. The cover also prevents dust mite infestation for the lifetime of the product, giving you peace of mind that you'll sleep allergen-free for years. These comforters offer the gold standard in healthy bedding basics and we highly recommend them.