The mattress comes packed inside a box and is available in full, queen, king and California king sizes. Costco also sells a hybrid Casper mattress and occasionally has pillows. Once you add one to ...

This as-told-to essay is based on a conversation with Yuliana Martinez (25) and Louis Orellana (20) from Los Angeles, California, about returning their used mattress to Costco. It has been edited ...

I was just cruising the Costco website, like one does, when I discovered that America's favorite warehouse store happens to sell mattresses. I knew it sold furniture, and in fact, someone I work ...