Spending time with Paige and Blake Mycoskie brings two words to mind: good genes. The sister and brother are both attractive—she, 30, with long blonde hair and an all-American vibe, and he, 34, with blue eyes and a mess of curly brown hair. The duo—who are also athletically gifted enough to have competed on The Amazing Race together—have both launched successful (and socially conscious) fashion lines, Aviator Nation and TOMS, respectively.