A custom designed slip-cover for your Heritage or Contemporary cushion. It's made in Canada from breathable, washable spring-mesh fabric, and it's designed to easily slip on and off of your Sp1ke cushion. Great for use in the car or on a office chair. The unique design that covers the cushion like a fitted mattress sheet has an open bottom so that the Sp1ke cushion stays in place on your car seat or other surfaces. If you need to put your Sp1ke cushion on the floor to stand or kneel on, you can quickly slip off the cover and slip it back on when you're ready to sit again.