The Matrix Deluxe Seat Cushion Unit is designed for anglers who find long sessions on a seatbox uncomfortable. It provides additional support and cushioning for those who have previously struggled to fish for extended periods, using high grade foam to improve overall comfort. - Developed using high grade foam to improve comfort. - Multi layered high density foam creates gradual compression. - Fits all Matrix Seatboxes. - Flexible pole support cup with built in spirit level. - Durable black PU coated outer fabric. - Materials – Foam Polyurethane / Outer Fabric 45% Polyester 55% PVC