Sleep Guardian King Mattress Protector - Lab Tested Premium Waterproof, Hypoallergenic Mattress Cover PROTECT YOUR MATTRESS' WARRANTY  Even a tiny stain can void the warranty on your mattress! The Sleep Guardian Mattress Protector offers 100% protection against damaging liquids, potential infestations, perspiration, and urine. HYPOALLERGENIC  Our premium mattress protector is fully hypoallergenic and protects against allergens, pet dander, and bacteria. It is perfect for people with asthma, allergies, and more! EASY USE & CARE - The Sleep Guardian Mattress Protector has a plush knitted microfiber surface, an elastic band, and is vinyl free. Simply fit it over your mattress and/or mattress pad and you're done. Plus, it's MACHINE WASHABLE. It's that simple! LIFETIME WARRANTY / SATISFACTION GUARANTEE  We are so confident in the quality of our product that we offer a 30-day satisfaction guarantee! If you are unsatisfied, simply contact us to return the product for a full refund. ULTRA-COOL BREATHABLE TECHNOLOGY  Using breathable material that allows for increased airflow, the ultra-cooling technology will keep you comfortable and cool throughout the night!