I'm a male applicant invited to an in person interview for an interdisciplinary PhD program. I will be interviewing with faculty from the following departments: Math, Computer Science and Engineering, Biomedical Engineering. My day to day wardrobe is flip-flops, sweatpants and a t-shirt/sweater but I fear that this is too casual for a recruitment event where I will be interacting with potential employers. On the other hand, none of my professors ever complained about what I wore to the lab, class, etc. I'd prefer to go about this like a normal day at school but I don't want to come off as sloppy.