The Nimbus Lite Endurabead foam roller is designed to withstand compressions better than other rollers. Under heavy use many foam rollers will start to break down when the roller is continually compressed by the user"s weight. The tiny bubbles that makes up the foam fatigues and breaks. Eventually, the roller goes out of round and often the roller is just replaced. The Exervo Nimbus Lite Endurabead foam roller is manufactured utilizing a completely different process than our traditional PE2 or EVA foam rollers. Beads of polyethylene are injected into a mold then compressed under high pressure. The beads bond and form the final product. The beaded structure of our Nimbus roller offers improved durability by withstanding compression (deflection) of the foam. Foam rollers are an essential tool for pilates core, ab and back stabilization and strengthening. Foam rollers are used as a balance training tool to improve balance for sports, everyday balance or in a physical therapy setting. They are also an excellent aid for self massage of the upper and lower back, calf, hamstring, glutes and quads. The roller is especially useful for IT (illiotibial) band syndrome. The Nimbus Lite foam roller is recommended for users whoe need firm, deep massage pressure. The Lite is approximately 10% less firm than the regular Nimbus. NOTE: The 36" full & half round Nimbus rollers feature molded radius edges on each end of the roller but the 18" full and half round have a radius edge on one end and a straight edge on the other. We use a hot wire cutter to make the cuts. This process melts and seals the cut end of the roller. Your order will include a link to our online compilation of foam roller exercise articles and videos. Applying the Nefitco firmness scale the Nimbus Lite roller is rated Level 4- Firm.