So I'm in Ganon's castle and didn't know I needed that random switch in the shadow room. I go back to it after sitting in the fire room wondering what the hell else I need to do. I get the gauntlets and head back towards out of the room. I get sucked in by whatever that thing is near a ledge and lose my fire tunic. Get spit back out into death. Cannot get my tunic back? -_-
Those things are called Like Likes. They will your gear, once they do you should be able to kill it then it will drop your item on the ground. If not Tunics can be bought. Go to the shop in Zora's Fountain, they will have Red & Blue Tunics. A bit pricey tho. I think around 300 Rupees.