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When you sleep soundly, you feel like you can conquer the world. So what if you could do that every night? You can with the Casper mattress, which has been obsessively engineered for outrageous comfort. The mattress, which has won countless awards, will deliver the sleep you’ve been desperately craving by combining a springy, breathable top layer of foam with high-density memory foam. You can even try the Casper mattress for 100 nights and return it for a full refund if you don’t love it. Plus, Cool Material readers can save $50 on the mattress with code CM50. It’s time to get better sleep.

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If you’re anything like us, you have quite a few quality watches in your collection. And yet, it still always feels like there’s another Rolex, IWC, or Omega missing. Enter StockX, the best place to buy and sell luxury watches. Whether you’re looking to pick up a new favorite, or sell one of your own pieces to make room, StockX has hundreds of different watches from all of your favorite brands. It’s time to upgrade your watch game. Sign up today and they’ll even give you $100 off your first watch purchase.