A cover for your gear knob....

[NP99]

WTF........

http://www.ebay.com.au/itm/Universal-Car-Auto-Black-Zippered-Gear-Stick-Shift-Knob-Cover-/390622230657?pt=AU_Car_Parts_Accessories&hash=item5af2e63881&_uhb=1

[Avo]

stops it from shrinking so you can still change gears in winter.

[mortn]

Bought... It's too big...