Stupidest Bike Accessory Ever

[uforgot]

Why is it stupid? Mine has saved my seat a time or two when I'm transporting my bike on the back of my car. I don't like my Brooks exposed to rain and sun while it's on my Thule. I used plastic bags a couple of times, but the wind catches them and rips them. This is pretty form fitting and works perfectly. Maybe it doesn't rain there? Once I left in early morning humidity/fog and it kept the seat dry then, too. I try not to expose my bike to the rain, but sometimes the weather changes on a dime and I've been caught in it.