Fuzzy window thing
Are your windows drooping? If so, that has nothing to do with your wool pile weatherstripping. These do not keep the window up in any way.
The device that keeps a window up, when raised, is called a balance. These are spring loaded mechanisms installed on either side of the window. We can supply this, but we will need a photo of yours out of the window, if possible. In the meantime, you can see our entire selection here.
Keep in mind that balances are somewhat complicated. You'll need a replacement that is exactly the same, or nearly exact, as you can possibly make it. I highly recommend showing us a photo of yours out of the window so that we can point you in the right direction.