Matrix Technology and Distrodensity Zones promote a targeted massage to increase circulation and help maintain flexibility. Ideal for use before or after workout. Travel-friendly design fits easily inside a suitcase or can be attached to a gym bag or backpack. Benefits: - Allows for blood and oxygen flow. - Helps maintain flexibility. - Aids in post-workout recovery. Length: 4 inDiameter: 5.50 inWeight: 7 ozImported.