Your pillow is as important to good sleep as your mattress, so don't settle for weak, unsupportive pillows. The Natura Cloud Plus Pillow features Natura Smart Wool fill which resists the shifting and clumping that occurs in synthetic and down pillows. Natura Smart Wool also resists mold, mildew and bacterial buildup while repelling dust mites, making the Cloud Plus the ideal pillow for allergy sufferers. Smart Wool also works to control temperature and humidity throughout the night by wicking away moisture for a dry, healthy sleep. The Cloud Plus has twice the fill of the standard Cloud Pillow for an extra firm feel.