Under Armour x The Rock Project Rock UNDER ARMOUR jersey. Size M. Brand new, unused. (The bag has been opened to check the condition.) Product DNA "Project Rock isn't a brand, it's a movement. It doesn't matter what your race, age, nationality, or occupation is. It's all about us. It's about building the belief that no matter what the odds, we can overcome and achieve. It all comes down to how hard you can push yourself." - Dwayne Johnson Training, muscle training, fitness.