With each shot, guns will increase their likelihood of jamming at a pivotal moment.
With each hit you take, your armour will become less resistant to dangers of all types.
The Tech in Zalissya is calledLens, and he is the first you’ll encounter in Stalker 2.

The Upgrade screen is used both for applying upgrades to your gear and for repairing it.
On the left-hand side you’ll see a list of your currently equipped (and held) items.
Next to this, the red text indicates exactly how much the repair will cost you in coupons.

If you might afford it, then hitR(orXon controller) to repair the item.
To use this exploit, first repair your item.
Credit toReddit user IronChumbofor discovering this quirk.

It is of course an exploit, so you may not wish to use it.
What happens if you don’t repair items in Stalker 2?
The durability system in Stalker 2 is fairly straightforward.

Only equippable items have durability - that means weapons and armour.
Yellow means slightly worn, and red means very worn.
If armour’s durability depletes, then its stats will drop over time.

This goes for masks and suits both.
The lower the gun’s durability, the higher the chance of jamming.
The only exception to this rule is if you visitRagman, the trader in Rostok.

That concludes this quick guide on how to repair items such as weapons and armour in Stalker 2.