An outfit she should've used for the Lamakan Desert.
Your comment gets an upvote as I remember that desert part of the game all too well, and she does go on about it - quote: "Ewww, my clothes are drenched. This is gross!" and a few other lines about her shriveling up and dying.
I think through the amount of times I've played the original Golden Sun, I've died a few times due to the heat meter hitting the red one too many times.