It's a ripoff Patagonia that my Dad gave me as a gift, so I try to use it from time to time. But how come it always slips down to my side? I have to push the thing back onto my back something like every 5 mins. of a ride. Is it possible to be too skinny for one of these bags?
Hipsters, bike messengers, poseurs, whoever, help me out, I'm tired of feeling bag-challenged on my bike.