If you're referring to the fuzzy strips that run along the bottom of the window opening I've heard them called a number of things, fuzzies, cat whiskers, beltline felts, etc.. I believe the "correct" name is window sweep that could vary as well. Most vendors will know what you're referring to.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.