Nike MC Trainer 2 Women’s Training Shoes Brand new size 9 The Nike MC Trainer 2 can help you shift from circuit training in the weight room to the field turf for quick-twitch conditioning, seamlessly. It’s a multipurpose power that combines versatility, stability and longevity to help you stay locked in on the physical task at hand. From back squats to sprint repeats, it can help support the rigors of your diverse training regimen without having to make a pit stop to grab more gear for your workout.