Simmons offers two mattresses, a hybrid mattress (on sale for $260) and an all-foam option (on sale for $242). Both are available in three different firmness levels—firm, medium, and plush.

Shoppers say the memory foam mattress is 'so comfortable,' they sleep like a baby on it — save nearly 40%.

Serta Simmons Bedding is merging with online bed-in-a-box seller Tuft & Needle as the industry grapples with digital disruption and turmoil at the nation's largest mattress retailer, Mattress Firm.