Amazon.comThe Grid, by Trigger Point Performance, is a versatile and comprehensive foam roller, with unique Distrodensity Zones, a matrix of varying widths and densities that allows for a precision massage based on individual needs. Just as a massage therapist uses different parts of the hand and arm to manipulate different muscle groups, The Grid\'s Distrodensity Foam Zones enable you to apply varying amounts of pressure to massage and release tight muscles. At 13 inches long by five inches diameter, the compact Grid is highly portable and yet still able to support up to 500 pounds.The Grid is designed for athletes and people of all types and skill levels, from distance runners to professional athletes to yoga enthusiasts to those simply seeking to keep active. It\'s an ideal tool for massaging lats, quads, lower back, or any other large muscle group, or achieving a challenging core body workout.FeaturesGreen technology:Constructed with less foam than traditional foam rollers Designed to withstand constant, heavy, and repeated use without breaking down Built from EVA foam Distrodensity Zones:Unique design allows for targeted massage Find the Distrodensity Zone that best suits your needs Distrodensity allows for a more realistic massage experience Core body workout versatility:Achieve a comprehensive core body workout Incorporate it into daily workout routines Compact design lets you travel with it and work out anywhereWarrantyThis Trigger Point Performance product includes a limited one-year manufacturer\'s warranty against defects in materials and workmanship.What are trigger points?Trigger points are tiny knots that develop in a muscle when it\'s injured or overworked, and are commonly a cause of most joint point. They\'ve been known to lead to headaches, neck and jaw pain, lower back pain, tennis elbow, and carpal tunnel syndrome.Based on the discoveries of Drs. Janet Travell and David Simons, in which they found the causal relationship between chronic pain and its

• IMPROVE MUSCLE RECOVERY - Multi-density GRID features a three-dimensional surface that provides more efficient muscle recovery by promoting tissue aeration as you roll, while promoting the flow of blood and oxygen for optimal muscle recovery
• OPTIMIZED FOR COMFORT - Unique foam construction with proprietary Distrodensity Zones is perfect to use on both tight, sore muscles, as well as soft tissue, for a more effective recovery experience
• PERSONALIZED ROLLING EXPERIENCE - Multi-density GRID pat