The government strongly suggests that women wear internal tampons and not pads…..when hiking in places like Yellowstone National Park. This is directly from the NPS (National Park Service) Website
“Considering bears’ highly developed sense of smell, it may seem logical that they could be attracted to odors associated with menstruation. Studies on this subject are few and inconclusive. If a woman chooses to hike or camp in bear country during menstruation, a basic precaution should be to wear internal tampons, not external pads. Used tampons should be double-bagged in a zip-lock type bag and stored the same as garbage.”
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