[Two types of massage balls that can relieve stiffness and tension in the body wherever you are] Roll, push, release and relax with the TRNR Massage Ball Set. These are the strongest allies against the stress caused by rigorous training and daily tension. Designed for those who are always chasing the next peak, this pair heals, inspires, and energizes. Ideal for athletes, yoga, climbers, and anyone in between, these two balls focus and stimulate your wrists, arches, pectorals, deltoids, and everywhere due to their small diameter. This set includes 1 soft ball for gentle pressing on sensitive areas and 1 hard ball for a deeper and more intense massage. TRNR custom wave designs are more than just a façade. The intentional design strengthens the grip and amplifies the effect of each roll and press. It relieves stiffness, promotes blood flow, and takes the massage experience to a new level. Each ball has a diameter of 6.5 cm, which allows you to carry it in your gym bag or leave it on your desk, relieving tension wherever you are.