Bed Rug brand impact bed liner with the tailgate flap that keeps all the crud from getting caught in the crack.
It's very nice option, I loved it. It has a durable plastic top but is still squishy for crawling around on.
Sells for like $480 new.
Check out my other auctions for more Super Duty parts. I have a 2024 F350 Crew Cab Long Bed being sold back as a Lemon. I'm selling all the accessory parts I bought for it. Everything is like new.