My personal favorite French fashion essential of all time is a white linen tee from Soeur, which I absolutely murdered over a single summer and wore to death. There’s nothing better for your summer Euro vacation than a slubby, nubby tee worn into transparency. Just get the right cut: I personally prefer something boxy, so there’s no need to tuck, with a generous v-neck, and relaxed (but not sloppy) short sleeves.