Target  (TGT - Get Report) announced on Tuesday that it will start selling mattresses, putting it somewhat in competition with industry leader Mattress Firm (MFRM) .

The retailer said it will begin selling the mattresses, plush sheets, a lounger and pillows, from e-commerce startup company Casper on June 18. Casper launched in 2014 and is backed by some notable investors, including actor Leonardo DiCaprio.

"Since our launch online three years ago, we've seen a huge demand from customers who want to experience the Casper brand in person," Casper CEO and Co-Founder Philip Krim said in a statement. "Partnering with Target allows us to bring Casper products directly to consumers in-store on a national scale."

Casper claims to have doubled its sales to $200 million in 2016. By entering retail stores such as Target for the first time, Casper could see a nice sales boost. 

Still, mattress sales are not doing so hot in the U.S.

Sales of mattresses and foundations in the U.S. fell 4.4% year-over-year in the first quarter of 2017, according to Bedding Market Quarterly, a sales trends report published by the International Sleep Products Association. Wholesale revenue slipped 0.1% in the quarter from the year-ago period, while the average unit selling price rose 4.5%.

At Target, a Casper mattress will be sold starting at a price of $550, its pillow $55, its sheets $90 and its lounger $120.