The Biggest Fourth of July Mattress Sales to Shop Online Right Now

Sleep Number i8 Smart Bed ($2,799, originally $3,999)

For a mattress that you can customize and truly make your own, go for this smart bed from Sleep Number. The model is available to shop in nine different sizes — ranging from twin to queen and split Cal King. Plus, you can browse through a number of different base options, which offer different capabilities like an adjusted head, adjusted footbed, and even a foot warming option. The mattress is a bit pricier than other models on this list, but it's also currently on sale (for 30 percent off, no less) at Sleep Number's Fourth of July savings event.