[FIXED] How to get procedure only when whole armor worn? And how to check for items in inventory?

So, I made a certain armor, but there is a special effect (burning in the sun) that I want to be applied after wearing armor. It is currently applied even if only one piece of the armor is being worn.

Also, I want a procedure that detects all the armor to give an advancement I made

Pls help

Also yes, I want the player to be avoided by skeletons when using the armor, please help with the detection of items