When shopping for a strappy sports bra, pay attention to the fit. A good product should minimize chest movement, but not be so tight that it interferes with breathing. When buying a strappy sports bra, you need to pay attention to the following points:

size. If you've never worn a sports bra before, start with your everyday bra size.
Straps: Shoulder straps should be padded and at least 1 inch wide so they don't dig into or slip off your shoulders.
Cups: Make sure your breasts are completely covered by cups. Choose seamless cups that won't rub against your nipples.
Straps: Straps should be wide and made of strong elastic material. Larger cup sizes may require wider straps.
Underwire: If you prefer a strappy sports bra with an underwire, make sure the underwire fits your bust properly.
Material. Choose bras made from synthetic fibers, such as Lycra. These breathe and absorb moisture.
comfortable. Hooks and closures should be covered with fabric or some kind of cushioning material. Likewise, the covered seams won't rub against your skin. If you have sensitive skin, apply some petroleum jelly to areas that tend to bruise, such as your décolletage, underarms, and shoulders.
When shopping for a strappy sports bra, try a few different styles and brands. Jog in place, jump up and down. This will let you see if it supports enough.