This Kensington Conform Back Rest features a springed design with ventilated supports for full back support and soft, breathable polyester fabric for comfort. The back support also features an adjustable strap attachment, which provides versatile use for a variety of chairs and users. This pack contains 1 black back rest. "Spend over £50 on Kensington SmartFit® Wellbeing Products and claim a FREE Premium Desk Mat. Available from 01/04/2021 - 30/06/2021 or whilst stocks last."