DoubletFamily Neck Stretch Pillow Price: ¥3,780 I purchased this to address my straight neck. I used it a few times and saw improvement, so I am selling it. The following is quoted from Amazon's description: Brand: Doublet Family Features: Portable, Lightweight Color: Black Size: Width 20cm, Length 22cm, Height 11cm Material: Polyurethane (PU) Shape: item_shape [Refreshes Stiff Neck Muscles] The Neck Stretch Pillow was created to solve the problems of modern people, such as chronic stiff shoulders and neck pain, heavy neck and shoulders from desk work, and not having time to go for a massage due to daily housework or work. It also addresses those suffering from straight neck. Just by sleeping on it for 10 minutes a day, your neck muscles are stretched, and you can refresh from your neck to your shoulders and shoulder blades. [Supervised by Many Judo Therapists] Recommended by Tatsuya Fujino, director of Relife Seikotsuin, a certified Judo therapist by the Minister of Health, Labour and Welfare, and Tomoya Kouno, director of Triceratops Seikotsuin Mishima! This neck stiffness relief product has a cushion shape that gently stretches the neck with the weight of the head while enveloping the head, correcting and caring for the neck muscles to the shoulder blades! Also for shoulder blade release! Relaxing effect! [Stretching Exercise Just by Sleeping for 10 Minutes a Day] No massage machine needed. Simply place the Neck Stretch Pillow on the floor and rest your neck on it to easily perform stretching exercises. The weight of the head stretches the neck muscles, and it can be used from the neck to the shoulders and shoulder blades. Care for your neck and shoulders while sleeping at home. [Product Features] Ergonomically designed to fit the neck and shoulders as a shoulder stiffness relief product. It uses urethane rubber material, which has a good feel and excellent elasticity. Six acupressure points gently apply pressure just by sleeping on it. It is lightweight and easy to carry, allowing for easy care at home or at your desk at work. It fits not only the neck but also the lower back! [Specifications] Neck pillow Product size: Width 20cm Length 22cm Height 11cm Weight: 310g Material: Urethane rubber material Color: Black Neck Stretcher Relaxation Goods Health Goods Neck Stiffness Straight Neck