Image: Naughty Dog / PlayStationOfficial screenshot from Naughty Dog / PlayStation.
Geared Up is the bronze trophy for crafting each item at least once. Joel's recipes are the Molotov cocktail, shiv, health kit, melee upgrade, nail bomb and smoke bomb, all made from the backpack menu with scavenged supplies.
Molotov: alcohol and rag. Health kit: alcohol and rag. Shiv: binding and blade. Melee upgrade: binding, blade and a melee weapon. Nail bomb: blade and explosive. Smoke bomb: sugar and explosive.