Crossfit - Nationwide

So lightweight (less than one pound!), but super-supportive—and the watermelon color is so summery.
Sneakers, $100, nike.com

Available in dozens 
of cities, this strength and conditioning program has some very butch credentials: It’s used to train police 
and military special-ops units—so there! Expect feats-of-strength challenges and endurance intervals, like 30 jump-
ups on a 20-inch 
box, 50 push-ups and 30 reps of hurling a 14-
pound ball. $10 to $20, crossfit.com