Wait! Your shirt has a back pocket? Tell me more about this marvel of modern fashion.
I can't tell if you're serious, but in any case cyclist's shirts have pockets along the lower hem on the back because they are out of the way when you lean forward and because pockets on your legs would be difficult to used due to leg movement. It has nothing to do with fashion and everything to do with function.
Agree with the rest of your comment though -- bike computers that do everything have been on the market for decades. Not to mention existing fitness watches that also fill the same market.
All of us stoners have seen desperate times and desperate actions but frankly mate you've taken the biscuit
He did?! I was wondering where that last biscuit went.
He has not acquired a fortune; the fortune has acquired him. -- Bion