A refuge is a fairly isolated type of high altitude accommodation. It is generally only accessible on foot (or by vehicle for the warden during part of the year, which allows him to stock up on supplies).
A refuge is a place where hikers and mountain enthusiasts can live and meet, offering a convivial experience of living in a community for a night.
Refuges can be either manned or unmanned. In general, they are manned in spring and summer and unmanned the rest of the year.
The wardens are in charge of running the refuge and very often prepare the meals. They are also there to teach you about the values of the mountains and to make you aware of the need to keep the area as unspoilt as possible.