Sun Capital Partners, a private investment firm, completed the investment in Mancini’s Sleepworld, a mattress retailer serving the Northern California market. Financial terms were not disclosed. "Mancini’s is in Sun Capital’s sweet spot: a family-owned business in an industry that Sun Capital knows well and where we have had a track record of success. The company’s success is a testament to Randy Mancini and Marc Fey’s hard work and business acumen, and we appreciate their trust in Sun Capital’s ability to partner with them in growing the business," Marc Leder, Sun Capital Co-CEO.