Take a look at these. (: The first time I've seen brush hair protectors like the ones they use to keep the fruits from getting bruised. I guess it works the same here. Keeps your brush hair intact, unbent and just generally protected. (:
They come in different available packs with respective prices :
Variety Pack:
1 extra small guards
2 small guards
2 medium guards
1 large guards
Shadow/Liner Pack:
10 extra small guards
Blush Pack:
8 small guards
Foundation Pack:
5 medium guards
Powder/Kabuki Pack:
4 large guards
Be sure to check them out if you want your brushes to last longer! :D They sell other accessories and make ups in store.