DreamFit's Best Selling Mattress Protector. ? Worried about moisture and bacteria creeping up on you at night? Our DreamCool Mattress Protector uses our patented moisture-wicking and cooling fiber technology that is also 100% waterproof. From twin to king, never worry again about a mattress protector too big or small for your bed. Patented moisture-wicking and cooling fiber technology. Eucalyptus fibers are silky soft, comfortable and quiet. Eucalyptus creates a dual climate sleep zone for partners with different sleeping climate preference. 100% waterproof. Breathable for enhanced airflow and comfort. StaDryTM technology in the cover captures, moves and releases moisture for healthy sleep. StaDryTM technology resists pooling by moving liquids away from the body further and faster. Bacteria and allergen resistant. Luxury sizing to fit today's thicker mattresses.