Serta offers several mattress types, including memory foam, innerspring and hybrid, and sizes from twin to California king. Serta also sells pillows, sheets, crib mattresses and pet beds.

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 ...