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 tracking sensors (so you can can ditch the wearables in bed) and adjustable firmness (you can can fine tune the feel of your bed to suit your sleep position and body type).

At $1,899 for a queen size at MSRP, the c4 is one of the most affordable smart beds out there and with Sleep Number's exten

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