Track Ball Soft Strength and forearm muscles NKNNN05010 and forearm muscles Sun protection up to 7 and a half hours with SPF 30PA++ to help you comfortably move in the sun without worrying about skin darkening Spine cradling massage toolAlleviate back and neck soreness and reduce your chance of recurring painAlso work on both sides of your bicep quadricep or calf muscle for an efficient massageErgonomically designed to access the muscles surrounding the spine and respect the integrity of its anatomy by avoiding direct contact with bonesLets you perform self myofascial release (SMR) to stimulate the stretch reflex in muscles and break up soft tissue adhesions (fascia) responsible for tension and stiffness