Our Very Firm balls are unique, designed with the size of a baseball and with a firmness harder than the palm of your hand but softer than your therapist's elbows. They're made from a special polyurethane that has good grip characteristics so they will remain in place where you want them. These hard massage balls are excellent for increasing your mobility and relieving pain through myofascial release. Myofascial release is your first stop for treating tendinitis and other chronic muscle and tendon pain including RSI, tennis elbow and plantar fasciitis. You'll find free online instructional videos on our website demonstrating their use with our other tools for guiding massage balls. Watch them and learn to do your own trigger point therapy, acupressure and deep tissue self-massage. These physical therapy balls make great gifts for your athlete / yoga friends or anyone looking for an extra firm massage ball set. Get relief when you need it, not when your therapist has an opening... Deep Recovery (formerly Massage Track) is your ticket if you want to release tight muscles safely and easily using the same techniques employed by the best physical therapists and chiropractors.