Do I need any additional hardware to install this on my truck bed?

Mounting brackets are included. You'll need basic hand tools to bolt it to your factory bed rails — no drilling or welding required.

Can I open just one panel to grab something from the bed, or do I have to fold the whole cover back?

The tri-fold design lets you fold individual panels from front to back, so you can access any section of your bed separately. You don't have to move the entire cover every time.

Will this cover stay sealed in heavy rain?

Soft covers shed water effectively and overlap at the seams to keep moisture out during normal rain. Standing water or high-pressure washing may find gaps — treat it like any soft tonneau, not a waterproof seal.