Sleep and breathe easy with the Emma Plus Mattress Protector. Engineered with all- natural Purotex probiotic technology for allergen- free sleep. And best of all, it’s completely waterproof. Why you'll love it A 100% natural sleep remedy against allergens from the sleep experts at Emma. All- natural, allergen- repellent Purotex probiotic technology. Proven to reduce dust mite allergens, cat hair and dog hair by up to 93. 7%. 100% waterproof. Repels sweat, spills and life’s little accidents. Enhances air circulation for an ultra- breathable night’s sleep. What you need to know Easy to remove. Easy to clean: washable at 40°C. Safe for the whole family. Purotex probiotic capsules are activated by friction while you sleep. This causes the probiotics to multiply and your mattress will be fully protected after two weeks of sleep.