The Chirp 3 Wheel+ Pack is the second edition of Chirp Wheels. It features ½” thick padding, a spinal canal, and is completely PVC free. The 3 different sizes of wheels apply different levels of pressure. The smaller the wheel, the more targeted the pressure, allowing the user to open up and target specific muscle knots. The Chirp wheels stretch and massage the thoracic and lumbar region muscles improving strength, flexibility. The Chirp wheels help provide balance and strengthen the muscles around the spine which supports the discs! Testimonials: "The Chirp Wheel is effective because it tractions the spine and takes pressure off the discs. It keeps, maintains, and helps correct the natural curvature of the spine. I highly recommend the Wheel to all my clients.” -Dr. Mike Vanchiere Spinal Rehab Chiropractor "The greatest gain I've had is in general mobility and feeling good in the morning. I roll out of bed every day and straight onto the wheel. It gets all the early morning kinks out.” -Kate C. Amazon Review “Perfect for my husband who is always hunched over a computer. We both never have the time to go to the chiropractor regularly, but the wheel is amazing at taking care of the aches and pains for us.” -Jenna W. Website 5-Star Review (5 stars) “I have struggled with pain in my neck and back on and off for the last 30 years. Recently I have been dealing with a bulged disc. When I found the Chirp Wheel I decided to give it a try. It is Great! I can gently put space between my vertebrae and loosen up tight muscles. Best back pain relief Iʼve had in years. Highly recommend it!” - Greg C.