An inexpensive roosting pocket can make a cozy shelter for a small bird, protecting it from rain and wind, or providing a sleeping spot at night.
 We have heard multiple reports of wrens using roosting pockets at night, and it is possible for a bird to take refuge in a roosting pocket any time the weather might create the need. 
Nestle a roosting pocket in a tree or bush, or hang it under an eave or off of a fence, and watch the birds take refuge from the elements.
Our roosting pockets are woven of natural grasses and straw, and look as charming as they are useful.

To conserve their engergy for foraging during the day, birds need a sheltered place to roost at night.
Roosting pockets also help to keep birds warm and dry during the winter.