Matrix Technology and Distrodensity Zones promote a targeted massage to increase circulation and help maintain flexibility. This foam roller uses one' s own body weight to apply direct pressure to knots for muscle relief and increased blood flow. 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 in Diameter: 5.50 in Weight: 7 oz Imported.