A bunkie board is a piece of plywood that’s placed under the mattress. It’s often used on top of an older box spring, foundation, or platform bed to provide proper support for a foam-based mattress.

If you have a foam-based mattress, like Casper mattresses, what you’re looking for is a foundation. Foundations are sturdier than box springs and give mattresses with memory foam the right support. A box spring looks more like a piece of furniture. It’s around 6” tall and can offer minimal support needed for a mattress.

A bunkie board can be used with a box spring or older foundation or platform bed to ensure that it’s able to properly support the weight of a newer foam mattress. The reality, however, is that bunkie boards don’t often last for the life of the mattress.

We spent thousands of hours designing and redesigning every angle of the Casper Mattress Foundation. We sat on prototypes, rolled around on them, and tested them for durability. Russell Jelinek, the lead engineer on the Casper Foundation, specially designed the brackets that hold the foundation together so they’re super durable and easy to use. The whole foundation can be put together in under 10 minutes. In the end, it matches your Casper mattress like an exhausted body falls into bed.