Ladies, take your battle for the environment a little closer to your heart with a solar-powered bra that can generate enough electric energy to charge a mobile phone or an iPod.

Ladies, take your battle for the environment a little closer to your heart with a solar-powered bra that can generate enough electric energy to charge a mobile phone or an iPod.

Lingerie maker Triumph International Japan Ltd unveiled its environmentally friendly, and green colored, "Solar Power Bra" on Wednesday in Tokyo which features a solar panel worn around the stomach.

The panel requires light to generate electricity and the concept bra will not be in stores anytime soon, said Triumph spokeswoman Yoshiko Masuda, as "people usually can not go outside without wearing clothes over it."

But it does send the message of how lingerie could possibly save the planet, Masuda said, adding that the bra should not be washed or sunned on a rainy day to avoid damaging it.

Being eco-friendly is now fashionable in Japan, and the "Solar Energy Bra" follows the company's other green-themed undergarments that include a bra that turns into a reusable shopping bag and one that featured metal chopsticks to promote the use of reusable chopsticks.

"It is very comfortable and I can really feel involved in eco-friendly efforts as well," model Yuko Ishida said.