Also, while traveling in a hot and humid climate (like Costa Rica), she'll probably want to put her passport and money into a ziploc bag before putting them into the travel pouch. The pouch is meant to be worn under clothing, against the skin, for security reasons. Unfortunately, that means the pouch can get sweaty. There are specialty moisture wicking ones that might help with the problem, but those would probably have to be ordered online.
Hope she has a great trip!