Matrx MX2 Carbon Fiber Back. Award-winning design recommended for highly active users. The unique, ultra lightweight carbon fiber design provides flex and absorption which may be beneficial to users with tone and spasticity. Breather spacer mesh cover with reinforced leatherette side panels. With Fixed Mounting Hardware Please allow up to 4 weeks for delivery from Invacare. For faster assistance, feel free to contact Motion Concepts directly at 1-888-433-6818.