Mattress Firm is closing more than 200 stores over the next few days. Here's the full list.

Business Insider/Mary Hanbury

Mattress Firm is closing 209 stores imminently.

• Mattress Firm filed for Chapter 11 bankruptcy protection on Friday morning. 
• As part of its bankruptcy restructuring, Mattress Firm could close as many as 700 stores, the company said.
• 209 stores will be closing in the next few days. Here's the full list of those stores. 

Mattress Firm has filed for bankruptcy and is closing hundreds of stores.

On Friday morning, the mattress-store chain said it would be closing up to 700 stores across the United States. 209 of those stores will close immediately. 

"The process we have initiated today will allow us to strengthen our balance sheet and accelerate the optimization of our store portfolio," Mattress Firm CEO Steve Stagner said in a statement.

"Leading up to the holiday shopping season, we will exit up to 700 stores in certain markets where we have too many locations in close proximity to each other. We intend to use the additional liquidity from these actions to improve our product offering, provide greater value to our customers, open new stores in new markets, and strategically expand in existing markets where we see the greatest opportunities to serve our customers."

With an estimated 3,272 stores, according to Wedbush analyst Seth Basham, Mattress Firm is the largest specialty mattress retailer in the US. It has increasingly come under pressure as startups such as Casper innovate the experience of mattress shopping and take market share.

Mattress Firm has also been struggling under a heavy debt load. It owes the mattress producer Serta Simmons, its largest creditor, just over $90 million, according to its bankruptcy filing.