Comcast Ventures, a participant in the smart mattress developer's $6m seed round last year, has come back for its $5m series A round.

US-based smart mattress producer Eight has closed a $5m series A round featuring Comcast Ventures, the corporate venturing vehicle for cable and telecommunications company Comcast.

The round, which included Yunqi Partners, Azure Capital, Sinovation Ventures, Y Combinator and the Stanford University-affiliated StartX incubator, brought Eight’s total funding to $11m.

Formerly known as Luna, Eight has designed a mattress incorporating technology that monitors sleep patterns and bedroom environment data to help track and improve sleep quality.

The Eight Smart Mattress can…