Browsing the Sleep Number Cyber Week sale for a great value, customizable smart mattress? My top recommendation is the c4 smart bed with added sleep tracking and adjustable firmness. It’s a lot of mattress for the money, especially right now as you can save 20% on select smart mattresses at Sleep Number. That reduces the cost of a queen c4 to $1,519 (was $1,899).
Like many of the best smart beds and mattresses we’ve tested here at Tom’s Guide, the Sleep Number c4 is complete with integrated sleep…
