Pesp Auto Car Office Seat Chair Massage Back Lumbar Support Mesh Ventilate Cushion Pad Pillow 100% Brand New&High Quality. Material: Elastic steel wire frame and nylon nets. Attaches by elastic band which enables you to adjust it to your perfect fit. The Mesh Back Support provides stress-free, all day comfort at work. Designed to attach easily to any chair, this Mesh Back Support helps reduce back tension by maintaining the lumbar curve of your lower back. Beads design to massage your back.