Covercraft SeatSaver Custom Seat Cover, Polycotton Grey SS8489PCGY. Fabric: Polycotton. 2019 - 2021 Chevrolet Silverado 1500 Custom Trail Boss Polycotton Grey, With 60/40-split Cushion With Solid Backrest With 3 Adjustable Headrests Without Fold-down Armrest/Cupholder With Center Shoulder Belt.