Every equipped piece that carries a durability bar loses one point when a fight ends in a win, a loss, or a forfeit. A fight that hits the turn cap, or otherwise ends without a winner or loser, does not wear gear. Pieces without a bar, like the rings and the amulet, never wear. A piece at zero is broken: it stays equipped but contributes nothing until repaired, and it marks your character's rail so you know to fix it.
The Armourer at the Provisions Shop repairs gear for Obols - one piece or the whole set at once. Gear is also per-instance now: each piece is its own item with its own wear, so two of the same name are two separate pieces with two separate bars. Worn gear shows its bar, and selling worn gear refunds a prorated amount; broken gear sells back for nothing.
