Eight is a sensored mattress cover designed to personalize and improve sleep for every body. Eight senses and analyzes over 15 factors from your sleep patterns and bedroom environment, to determine the conditions that help you rest your best. Unlike wearables or smart watches, Eight’s advanced algorithms use more than just your wrist’s movement to determine how you are sleeping—so it’s a lot more comprehensive. Plus, you don’t have to remember to wear it every night. And Eight is designed so well, you won’t even know it’s there.