Barbecues, fireworks, and endless mattress sales come on the Fourth of July.In fact, we’d even say it’s the best time of year to buy a new bed, thanks to tons of amazing deals on every mattress imaginable, from hybrids to memory foam options.After all, sleep has never been more important to our physical and mental health, which is why we’re taking our time to focus on these 15 best 4th of July mattress sales happening right now.