The TriggerPoint GRID Ball combines the best of both worlds, blending a next-generation massage ball with TriggerPoint innovative GRID pattern foam rolling technology. With a compact, lightweight, and portable size, the massage ball design makes for an efficient tool for targeted pain relief. The GRID Ball's 5-inch diameter elevates the body to better target hard-to-reach areas such as the hips and shoulders, while the signature GRID pattern channels to repair muscles as you roll. This a convenient recovery aid for use almost anywhere, at any time to help release muscle tightness and improve flexibility in anyone experiencing muscle pain or tightness. Self-massage therapy massage ball provides targeted relief to tight and sore muscles, especially in hard-to-reach areas 5-inch diameter targets tightness in hard-to-reach places such as shoulders, traps, and hips to relieve muscle pain and improve mobility GRID pattern promotes increased blood and oxygen flow to muscles for quick muscle recovery The lightweight, portable, and durable EVA Foam massage ball is an ideal travel companion on the road Includes access to a free online instructional video library on foam rolling exercises from the experts at Trigger Point Approximately 5" x 5.7" x 6.4". 325 lbs. Weight limit