Supermodel Gisele Bundchen is clearly quite athletic…but I guess you’d have to be. Check out these candids of Bundchen and her sister mountain biking in Australia. Her undies are not at all discreet in the second picture. I didn’t know that g-strings and exercise went well together?

Gisele Bundchen mountain biking

Gisele Bundchen mountain biking

Gisele Bundchen mountain biking

Via celeb city