Like all other Barrows equipments, this will degrade slowly as you use it in combat, changing the name from 100 -> 75 -> 50 -> 25 -> 0. You have to use your barrows armour in combat for 8 hours for it to degrade completely. (You won't be able to use it at all when the count reaches 0)
For example, an Ahrim's hood that have been used for 4 hours in combat will be "Ahrim's hood 50".
When your armour degrades, Bob the axe seller in Lumbridge will fix it for you for a price (varies on how much the armour is degraded) or you can fix it on an Armour Stand in POHs for a lower price depending on your smithing level. A barrows item is only tradable when it's new and doesn't have a number next to it, or completely degraded.
When the full set of Verac is worn the special effect allows you to hit through prayer as well as defence bonuses.