Relieve tension and support your posture with the Chirp Wheel XR Foam Roller Set. It's designed to target different areas of your back and neck with focused pressure. There are three textured wheels - a 10” acupressure wheel for broad back support, a 6” knot-kneading wheel for tighter areas and a 4” wheel for targeted neck relief. The Spinal Canal design has a hollow centre that runs along your spine, so pressure is applied to surrounding muscles rather than directly onto your vertebrae. That keeps things comfortable and controlled.Good to know The extreme relief design gives deeper and more focused pressure than standard rollersAt-home decompression helps stretch your back and relieve pressureMulti-condition support means it can be used to support posture, ease soreness and help with muscle stiffness