They are a fine humidor bag if not a little pricey; they also claim to go 6 months whereas the other bags say 3 months. I prefer to go the cheaper route because I've never left them in a humi-bag for more than a month, opening once a week to get some fresh air in there. Coupled with a strong container of most anything IMHO you can't beat a humi-pouch for no worry humidification when traveling or short trips.