●Alleviates Back & Neck Pain - Massage your back & neck using our therapy roller to release pain & tension. Our sustainable roller features a Spinal Groove for less pressure on the spine & moderate to intense pressure on the erector spinae muscles where you need it. ●Designed for Large Spine - whilst this yoga roller is great for any body size, it has been especially designed for those with a larger spine. The spinal groove on this 4-inch cork foam roller is wider and deeper, so the spine will fit perfectly, making this more comfortable to use than a flat foam roller, even though you will get deep pressure on the spinal muscles, where it is needed to release tension. ●Super Strong & Study - Our durable extra-wide 4-inch back roller wheel for relief can withstand weights over 21,000 pounds. Rely on this yoga back roller for efficient support as it rolls your aches away. ●Sustainable Foam Rolling - Our spine roller is 100% crafted from natural cork. It’s a moisture-wicking exercise wheel that’s derived from a still-standing cork oak tree planted 25 years ago. It has no plastic material & doesn’t emit any lingering odors. ●Portable & Convenient - Get instant relief from muscle stiffness even on your travels with our handy 4-inch muscel roller! Take it anywhere you go! Simply toss it in your gym bag or luggage. Take it to work, and get through another day smiling!