Oddity with dent and a metal shirt turned into wood

The shirt is actually wood, should it still be targetable with dent? Thanks The treasure guardian is covered with bleeding wounds. <98%/865 838>(12 AM)[cave indoor] ! You shiver and suffer. Your poison devastates you! The two-step snake bites you! The treasure guardian swings a powerful blow at you, denting a green-tinted woven mithril mesh shirt. The two-step snake's poisonous bite MUTILATES you! You knock the treasure guardian's pound aside before it comes near you. You dodge the treasure guardian's pound. Your thrust MASSACRES the treasure guardian! The treasure guardian dodges your thrust. The treasure guardian is covered with bleeding wounds. <90%/865 878>(1 AM)[cave indoor] You begin your dance and violently whirl around, striking at all who attack you! Your whirling strike *** DEMOLISHES *** the two-step snake! Your whirling strike *** DEVASTATES *** the treasure guardian! The treasure guardian is covered with bleeding wounds. <90%/865 858>(1 AM)[cave indoor] <81%/865 878>(12 PM)[mountain outdoor] exa shirt Somewhat less substantial than true chainmail, this lightweight mithril mesh shirt sacrifices some protective value for mobility. The strands of mithril weave are small enough that they barely emit a whispering rustle as the shirt moves. Some of the natural luster of the metal has been replaced by a dull green tint, applied somehow during the extrusion of the mithril into strands. A green-tinted woven mithril mesh shirt is armor worn on the body, made of wood, and weighs 9 pounds 14 ounces.