A California mattress retailer with about 300 stores has arranged to buy nine America’s Mattress stores in Hawaii.

Sacramento, Calif.-based Sleep Train announced the purchase agreement Wednesday. Financial details of the transaction were not disclosed. The sale is expected to close April 23.

The Hawaii stores being bought include five on Oahu, two on Hawaii island and one each on Maui and Kauai.

Sleep Train was founded in 1985 and offers a stock ownership plan to its roughly 1,600 employees.

The company over the last several years has been acquiring mattress retailers largely on the West Coast, including Sleep Country USA, Mattress Outlet and Christian’s Mattress Xpress. Other brands under Sleep Train include Got Sleep? and Mattress Discounters.