I'm pretty darn happy being a boy, but when an invention like this comes along, I kinda wish I had a little less Y chromosome in my system.

Ladies, meet The Joey Bra. Underwear meets fanny pack meets seriously great idea. (Unless, I suppose, you're um... a pretty sweaty person)

Here's a little demo from the creator about how easy it is to use.

"Don't want to carry anything, but still want to feel sexy? JoeyBra works with or without items, making it the perfect go-to bra. With our patent-pending design, we have concealed the pockets so that you are the only one who will know it's even there.

Our unique product allows women to finally ditch the purse and opt for freedom. JoeyBra, a sexy pocketed bra, offers two discreet pockets on the sides of the bra. While maintaining a low-profile and without changing the shape or fit of the bra, our pockets can carry a phone, ID & credit card, and a key." 

Read more here