Used a few times, but no longer needed as I purchased a massage chair. Will disinfect with alcohol before shipping. Thank you. Product Information: Dr. Shuya Nakatani, Chief Physician at Nakatani Acupuncture and Osteopathic Clinic, Acupuncturist, and Judo Therapist Stretch and press firmly! Refresh stiff head, neck, and shoulders all at once with the "Gui-Oshi" Neck Stretcher! Presses a wide area at once! 16 large and small protrusions, a first-character shape for a secure fit, and a three-dimensional shape for stretching, it feels like you're being massaged by a professional, "Gugut" and GOOD! ■ How to use: Place the main unit on a flat floor and lie on your back on it, using it for about 5 minutes a day. ■ Material: Polyurethane