You're going along, walking the dog, running by yourself, driving by, or maybe zooming by on a bike, and you see a slow runner. They could be old, they might be young. They might be small or large or even huge. They may have the most f'ing awful stride or move with the grace of a ballerina. They may be fashionably sporty, practically dressed, or running in jeans and flip flops.
TL;DR: If you have a small ribcage (= USDD), the sports bra you want is the 
I went back up Mt. Wire today. Has been nearly a year and a half since I went up. I usually go to Red Butte and back down, which is ⅔ of the climb, and a very lovely hike. Today, I wanted to go to the top. I wanted to summit and see the tower again.