When you buy through our links, we may earn money from our affiliate partners. Learn more. Leesa Cyber Monday has turned into Cyber Week, with retailers like Walmart and Best Buy starting their sales before Thanksgiving and extending them days after.Brands like Leesa, Casper, Tempur-Pedic, Purple, and Tuft & Needle always offer Cyber Monday deals that can save you hundreds of dollars on comfortable and supportive mattresses. Read about the best mattresses here as they may be on sale during Cyber Monday this year. Check out Insider Reviews’ Black Friday 2020 deals and Cyber Monday 2020 deals coverage for more savings. Cyber Monday is one of