We have used the genuine CALIFORNIA DUSTER for many yrs after reading about them here on NAT! Another NAT victory! We use both the full size & minis. If they get so grotey that you can't stand the looks of them, throw them away & start again. We use them on windows & interiors alike. Use them on show tractors also. No scratches!

But my friends @ Farm & Fleet also sell a "knock-off" version that's a few bucks cheaper. I had to try one. I will not buy the knock-off version again however. The strands of material come off the duster & you'll find them deposited around cracks & crevises on your dashboard if you use it to clean vehicle interior. I've never seen the original California Duster (name brand) shed single thread.

We also use a California Duster in the office to remove dust. 

Here's link to California Duster:
http://www.calcarduster.com/default.asp