This story was written in collaboration with Forbes Finds. Forbes Finds covers products and experiences we think you’ll love. Featured products are independently selected and linked to for your convenience. If you buy something using a link on this page, Forbes may receive a small share of that sale. You could get a big TV or a bunch of smart gadgets this Black Friday, but one of the best ways to save this year is by cashing in on one of these impressive mattress deals. Worried about taking the leap and buying a new mattress online without ever laying down on it? Don’t worry, all major brands offer at least a 100-night trial (if not more). Sleep on it for a month or two, see if you like it, and if not, get your money back. The Leesa is my go-to mattress when anyone asks which bed-in-a-box they should get. It keeps you cool. It’s not overly cushiony and it’s not unforgivingly firm. It’s the Goldilocks of mail order mattresses. What I love about Leesa is that no matter what the conditions I’m sleeping in, I wake up refreshed and feeling, not just good, but great. The memory foam is supportive in all the right places and the cooling gel actually does what it...