Whilst on my journey on designing with a post apocalyptic future in mind I watched many apocalyptic films for inspiration on clothing and fabrics as well as getting in the frame of mind of what life would be like.
Here are links to clips and write ups on a few of the films I watched.

I am legend-
Write up http://www.imdb.com/title/tt0480249/
Trailer http://www.youtube.com/watch?v=ewpYq9rgg3w

resident evil-
write up http://www.imdb.com/title/tt0120804/
Trailer http://www.youtube.com/watch?v=IvaNAhoQNtE

Mad max-
write up http://www.imdb.com/title/tt0079501/
Trailer http://www.youtube.com/watch?v=0BfZGF1dBQM&feature=related

The lost future-
write up http://www.imdb.com/title/tt1615091/
Trailer http://www.youtube.com/watch?v=XO426vIQBps&ob=av3n

The lost future if my favourite film out of these because humans have gone back to complete basic survival, live in tribes, dress in animal skin and look like a native tribe. The tribes I started to look at are very similar.
I liked watching the film for flow of fabrics and ease of movement. I got a lot of ideas from this movie.