Color us impressed. After a year of concierge mobile tanning, PureGlow opened its Back Bay boutique, a sun-filled studio with three private rooms where tans are customized and hand-sprayed. Its nearly 100 percent organic formula has hydrating ingredients such as aloe vera, COQ10, and Vitamins C and E that react to produce a color similar to your natural tan. The staff can even contour and minimize trouble areas by playing with shading. Can you say summer six-pack?