The Ioka Village Hut is a location in Chrono Trigger where players can trade goods for equipment in Prehistory. The goods that can be traded are Fang, Petal, Horn, and Feathers. These items can be acquired from any enemy in Prehistory, but mostly from creatures that dwell in the Hunting Grounds. By offering the trader three of any of these two items, special weapons and armor can be acquired.
Given that there are five party members - Crono, Marle, Lucca, Robo, and Ayla - at this point in the game, and Ayla joins already wearing a Ruby Vest and Stone Helm, the following items are required to fully-outfit all members of your team:
After returning to Prehistory following the defeat of Magus, the trader will have upgraded the weapons he has to offer.
After reviving Crono, you can trade for Ruby Armor which costs 10 of each.