Revolutionary Foam Roller - Features Distrodensity Zones, Matrix Technology and an environmentally friendly design, Being only 13" long and 5" in diameter, the sleek design of The Grid makes it an excellent travel companion, Foam Rolling or Body Rolling is a form of self-massage used by fitness enthusiasts, athletes and therapists to relax or ""release"" tight muscles, This form of massage is designed to increase elasticity of connective tissue therefore relaxing the muscles allowing them to respond more efficiently and effectively during activity, Foam Rollers can be an invaluable tool for core development, stabilization and strengthening, Foam rollers can also be used to enhance balance for everyday activities or sports, Rollers come in various sizes ranging from 12"" up to 36"" in length and are usually 6"" in diameter in full or half models, The longer rollers are typically used for massage as well as postural alignment, Whereas the shorter rollers are ideal for acute massage or make an excellent travel companion for on the road self massage, The half round versions are sometimes used to enhance some balance exercises or to decrease the need for balance for other exercises, Either way, foam rolling is a bonus to any exercise routine! SKU: PWSS553