Waterproof truck bed bag ideas?

[kosmo886]

Given the truck is water resistant and not waterproof, I’ve been thinking of ideas that are easy to solve the issue of traveling in the rain. Thinking about something like the link below that can fold flat and store in the locker when not in use then easily take out and still use the whole bed. Does anyone know of a good one? Or are there better options?

https://a.co/d/gULcpv7

 

[Electric Metal]

Rhino-Rack makes some pretty nice ones. My friend has them on his Jeep.