Now is the best time to buy a new mattress. Black Friday mattress promotions are peaking, with the best mattress brands currently offering significant discounts.

Serta, for example, is offering up to $400 off its iComfort Mattress. With discounted prices starting at just $609, this is Serta's lowest price of the year.

Serta's iComfort mattress is a memory foam mattress designed to keep warm sleepers cool. This three-layer mattress features a ColdTouch cover for a cool feel, EverCool Fuze Gel Memory Foam that wraps around the body to relieve pressure, and EverCool Fuze Gel Foam that allows air to flow and heat to escape. There is also a model with Carbon Fiber Memory Foam for additional back and neck support.

All Serta iComfort mattresses come with a 120-day in-home trial. They also come with free shipping/returns and a 10-year warranty. The mattresses are also designed and made in the USA

Follow our mattress deals coverage and our Cyber Monday deals coverage for post-Thanksgiving sales.