The Earthing Sleep Mat is our most versatile grounding sleep option as it's able to fit on any size mattress, and be set up horizontally or vertically across the bed. Made from our proprietary grounding material developed by our founder, Clint Ober, it is the culmination of two decades of his research and development. The grounded Sleep Mat is 100% conductive, easy to clean, and very durable. It's the perfect way to ground when traveling too, especially when you're unsure what size mattress you'll be sleeping on! For those of you who sleep with a partner, you have the option for only one of you to be grounded by setting up the Earthing Sleep Mat vertically on one side of the bed. Or, you can set it up horizontally across the mattress so that you can both ground either the lower or upper half of your bodies. Dimensions: 27" x 84"