Hard Trifold Tonneau Cover - AlloyCover | WeatherTech
Tri Folding Truck Bed Covers - 3 Way Fold Tonneau Covers by Lund Truck®
Amazon.com: Gator EFX Hard Tri-Fold Truck Bed Tonneau Cover | GC14020 | Fits 2019 - 2023 Chevy/GMC Silverado/Sierra, works w/ MultiPro/Flex tailgate (Will not fit Carbon Pro Bed) 5' 10" Bed (70") :