Timberbrother Yoga Wheel for Yoga, Relaxation and Fitness Sturdy & Durable: Certified Non-Toxic environmentally friendly materials, No Chemical Smell Lightweight & Portable: Timberbrother Yoga Wheel is 12.7" diameter, which easily fits in your gym bag or carry-on luggage Stretch & Release - Yoga Wheel design helps open up back, chest, and hips to release tight muscles and improve flexibility Support your body for more challenging poses. Also adds fun and creativity All Timberbrother products are backed with a 100% quality guarantee