Now through Wednesday, July 17, the Casper sale is offering up to 30% off everything — including mattresses , bedding, bundles, furniture and more. Prime Day is typically one of the best times of year to shop for larger purchases like a new mattress, so don't sleep on these savings.

Amazon Prime Day aside, you can score savings on the best mattresses during early spring and late winter. Also keep an eye on prices during holiday weekends like Presidents’ Day, Memorial Day, Labor Day and Black Friday, when retailers tend to offer their best discounts on high-priced items.

This Nectar mattress is a whopping 46% off, saving you an unheard of $550 this Prime Day. It has cooling memory foam gel comfort, a year long sleep trial, five layers of mattress material, and a pillow top. Its softness rating is 4 out of 5 stars and almost 4 stars for sleep quality and comfort.