comes with a blue neoprene-like foam for humidification. it does the job easily for smokes on the go, but is tricky to keep a sustained and consistent humidity. i use one of Boveda's small size humipaks and it holds the reading consistently. i had used duct tape to hold the bottom on (where the humidifier foam is seated), as it just slips in, not threaded. can easily inadvertently open in luggage.
gtrisfun in honolulu, HI November 9, 2012