Rest Evercool Standard Cool Grey Pillowcase keeps you cool through the night with breathable, moisture-wicking fabric and a percale plain weave that promotes airflow. The blend includes 7% ionic silver nylon, 80% nylon and 13% spandex for a soft, stretchy fit that helps reduce microbes and allergens. Sized for standard pillows and machine washable, it's an easy way to upgrade your sleep with cooler, cleaner comfort.