The Mascara that Will Last Through Even Your Toughest Workout Class

Exercising in New York City has come a long way from Jerry Seinfelds amusing morning stretch routine. What ever happened to throwing on your pit-stained college tee, pulling your hair up into a scrunchie, and heading to the nearest Y? These days, workout studios are as chic as salons, where instructors and attendees sport leather leggings and master the no-makeup makeup look.

Im an unabashed addict of Brooklyn Bodyburn, a workout dubbed pilates on crack by New York Magazine, and during which I melt into a mix of sweat and last nights margarita on the regular. But its tough enough to do the exercises when there isnt a Victorias Secret model gracefully lunging beside you, let alone when she is, her face perfectly flushed. So its time I stepped up my game.

For me, less is most certainly more when it comes to wearing makeup to work out. Foundation and lipstick would decamp to my towel and water bottle, respectively. Waterproof mascara is the obvious answer, but one too many breakups (and puppy-filled Budweiser commercials) have proven not all waterproof mascaras are created equal. Enter: Eyeko Sport Waterproof Mascara, just one of the workout-appropriate products in Birchboxs new Limited Edition: Gym Bag Heroes box.

As its name suggests, Eyekos ingenious formula is designed specifically for the gym, promising to stay smudge-free under extreme sporting conditionsaka pilates on crack. The conditioning gel formula coats lashes with collagen, vitamin E, lash-enhancing fibers, and no less than 11 fruit extracts to boost lash growth long after your cool down. And its 100 percent waterproof. Not 99 percent like lifes other necessities. 100 percent.

Well, Ill be the judge of that. Outfitted in my neon Nike Flyknits and printed capris, I enter class armed with Eyeko Sport. (The squeezy-tube packaging is winning me over already.) In the (MALIN +GOETZ)-scented bathroom, I apply one coat, which goes on so smoothly I boldly go in for a second. My lashes look longer and thicker, indeed, but this is only the beginning.

For 55 minutes, I squat, crunch, and curl, wiping sweat away with abandon. When its over and I finally force myself to look in the mirror, Im pleasantly surprised (OK, shocked) to find my mascara has stayed put. No clumps! No flakes! No raccoon eyes! And hey, my fluttery eyes complement my florid cheeks. Instead of hightailing it home to do my makeup as I usually do after class, Im inspired to go out for another margarita. So, to my willowy workout cohorts, you know who you are: Bring it.

Samantha Gurrie