When you die your armor and equipment take damage. 10% per death, except for Fabled gear which only takes 5% damage. When your gear reaches 0% it breaks and ceases to provide any protection or bonuses.
You can go buy all new gear, or... you can go pay a mender to fix everything. The higher the level and quality of the gear, and the worse the damage, the more it costs to repair.
You can view an advanced search of all Menders in all zones.