Casper Onyx 2.0 Mattress

A Split King consists of two separate Twin XL mattresses and two separate adjustable bases placed side-by-side. This allows you and your partner to adjust your head elevation independently without disturbing one another.

The included base is designed specifically to elevate the head portion of the mattress using a wireless remote. It does not offer foot elevation or zero-gravity presets, keeping the operation simple and focused on improving sleep posture or reading in bed.

No. The Onyx 2.0 uses a triple-layer foam construction, including a firm Casper Core base designed to provide structural support. This prevents the 'sinking' feeling often associated with traditional memory foam while still offering pressure relief.

Yes, the mattress features ventilated foam and Breathe Flex Foam, which are engineered to promote airflow. These materials help dissipate heat more effectively than standard high-density memory foam.

This certification ensures the foams are made without ozone depleters, mercury, lead, or other heavy metals. It also guarantees low VOC (volatile organic compound) emissions, meaning you won't experience strong chemical odors when you first unbox the mattress.

The mattress is 10.5 inches thick. Because it is a standard profile height, it will fit most deep-pocket or standard fitted sheets, though you will need to purchase two sets of Twin XL sheets to accommodate the split design.