Arcus Memory Foam Seat Cushion -Mesh for Cool Comfort. Sit in Comfort Again memory foam ARCUS Memory Foam seat cushion is ergonomically designed for good posture and pain relief. Exceptional quality memory foam which blends to the contours of your body providing comfort A must have for anyone suffering from spinal pain and a sedentary lifestyle Mesh cover allows for cool comfort throughout the day Machine washable cover for easy maintenance