Okay, I'm sure it's been asked and answered but I'm too old and crotchety to read through pages of search results.... Ahem why do some jackets squeak so badly and other's don't. I've a GoodWear A2 that squeaks like mice are having an orgy in my armpits while my Aero A2 is completely silent. Is the answer: 1. Age/break in 2. Tanning method 3. Leather species (i.e. goat vs. steer) 4. Height of armpits 5. All of the above 6. Voodoo? I'm lost and Puddin' is curious as well. Any help would be appreciated. The "I'm Curious" Worfster.