●Patented foam roller design offers a superior, multi-density exterior constructed over a rigid, hollow core ●Constructed from quality materials that wont break down or lose shape from repeated use ●Includes access to free online instructional video library on foam rolling best practices from the experts at TriggerPoint ●Trusted foam roller of physical and massage therapists, coaches, trainers and athletes provides muscle recovery, pain relief and improved flexibility ●Original GRID: Standard density, 13 x 5.5 inches, 500 pound weight limit; 1 year manufacturers warranty