High Quality Waterproof and Featherproof & Downproof: Our waterproof pillow protector are certified standard 100 by OEKO-TEX which means they are third-party tested to ensure the product is no harm to human health, meets the requirements of consumers for healthy life. And it can also stops feathers or down from poking through. The waterproof membrane laminated to prevents bodily fluids, pollen, and other something harmful to your health that grow into the fibers of your pillow. Breathable and Durable membrane: Premium waterproof layer material (TPU) of the pillow protector allows air to pass through while keeping moisture out. And this pillow protectors standard size is very durable use which can be washed more than 100 times. Smooth Fabric and Fully Enclosed: Made of microfiber jersey knit fabric, breathable and comfortable. Meanwhile our standard pillow protector with high quality zipper, that keeps the pillow in place, prevent slipping outside and provide complete protection. Size: Our standard pillow protector measures 20" x 26", queen size pillow protector measures 20" x 30", king pillow protector measures 20" x 36", perfect for home bed or use in a hotel. Machine washable, dry on low heat. Moonsea Guarantee: The waterproof pillow protector quality you can trust so you can buy at ease. If there is any problem with our pillow protectors pillow covers, please contact us and we can replace for you or money back without excuses.