The Select Comfort Sleep Number Foam Rails 5 Pieces in yellow are designed for a queen-size Sleep Number bed, standing at 6 inches tall. Made of foam material, these adjustable firmness rails offer comfort and support for adults. These rails are part of the Sleep Number product line, known for their quality and adjustable features, creating a personalized sleeping experience for the user. Ideal for those looking to enhance their Sleep Number bed with adjustable rails in a vibrant yellow color.