The radiation suit package is a quest item in Fallout: New Vegas
In order for Logan and his prospectors to go out into the irradiated Camp Searchlight, they require a shipment of radiation suits.
Boxcars in Nipton says the shipment is in the hidden supply cave just north of Nipton. Once inside here, you will find the package in one of the footlockers.
If you take the radiation suit before opening the footlocker you are unable to open the footlocker and get the package.
- The first time you enter the cave, the lockers may all be empty. Just leave the cave and return back inside; the suits and other loot should be there.