There are seemingly dozens of internet mattress companies these days, but Eight Sleep sets itself apart by piling on smart features, and you can try out any of their mattresses for 25% off with promo code KINJA25.

The mattresses themselves are basically what you’ve come to expect from internet mattresses these days: They’re blocks built from multiple layers of different types of foam. With Eight Sleep though, you do get to pick from three different tiers, including one with innersprings that should be more breathable. Whichever mattress you choose, you’ll probably like it just fine, and if you don’t like it, Eight Sleep offers the industry standard 100 night trial period, so you can return it for any reason.

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Eight Sleep’s real magic comes from its unique mattress cover, which has smart features built in that you’ll actually want to use. It can track your restfulness, heart rate, and other sleep stats independently for each side of the bed, wake you up with a smart alarm when you’re not deep in a REM cycle, and even integrate with other smart home appliances. So you could conceivably change your thermostat temperature automatically when you get into bed, and start brewing coffee whenever you’re about to wake up.

The best feature though, without question, is dual zone temperature control. Yes, the mattress pad doubles as a smartphone-connected electric blanket to warm each side of the bed independently, which may not seem appealing right now, but you’ll thank the stars for it come winter.

Our exclusive 25% code (again, it’s KINJA25) brings the entry-level mattress down to $449 for a queen (far less than the equivalent Casper), or $599 with the smart mattress cover.