Depends on how many times you watch the loop

Shelters in general are really overwhelmed with messages/calls right now. I’d check shelter websites (they usually say what donations they accept) and then just physically go and drop it off.

This is all great advice. I’d like to add that they have mattress and pillow protectors specifically for allergies. Both these things are dust sponges. Depending on the covers you get they can be a bit crinkly to get used to but it might be worth it.