Milliard Memory Foam Seat Cushion/Chair Pad 18 x 16 x 3&rdquo; with Washable Cover, for Relief and Comfort Milliard Memory Foam Cushion is designed to provide therapeutic comfort for sitting, even for prolonged periods of time. Cushion helps maintain proper posture and provide stability while seated. Memory foam is known for therapeutic qualities and comfortable support. It's designed to conform perfectly to the contours of your body for maximum comfort and support. Our premium memory foam supersedes all with superior high density construction for longer lasting product. The Milliard cushion is ventilated for air flow to help regulate temperature for maximum support and comfort. The memory foam relieves discomfort, aches, and fatigue for one and all. Enjoy optimal comfort while sitting for extended periods of time. Includes breathable mesh, cover that zips off easily for machine washing. Cushion measures 18in.x16in.x3in..