The Eight Sleep Tracker is just like a mattress cover. You place it onto your mattress, under your fitted sheets. It fits mattresses up to 20 inches tall, and can be used on any mattress.

The Eight Sleep Tracker turns any mattress into a smart bed. With sophisticated sensors and highly advanced algorithms, the cover is one of the most comprehensive sleep tracking systems. You can access data like sleep phases, heart rate, and respiratory rate right from your phone each morning. Plus manage your bed temperature and connect to other home devices for a more seamless bedtime routine.

Yes, Eight uses a dual-zone sleep tracking system which allows sleep data to be tracked separately, and temperatures to be set independently for each side of the bed. Partners can be invited to use Eight through the app, under the My Eight section in the Menu.