Although Fuji X-Pro1 is not weather sealed it did survive in some pretty nasty condition, including the hail storm. But would I do it again? Absolutely not! Followed on recommendation from one of the dpreview forum member I bought very inexpensive rain sleeves from OP/TECH and tested them today.
They may look almost like a regular plastic bag, but surprisingly do the job well. I spent about an hour under the drizzling rain taking pictures in my garden and both camera and the lens were absolutely dry.
Drawstring is pretty snug and if you add filter to your lens it will be even more protected. Overall the product is good, compact (fits in the pocket) but can be very handy in harsh weather conditions.
All the best,