I received this for free, but I'm selling it because I don't use it. I opened it once to check the contents, but I haven't used it. [German Red Dot Award-Winning Brand] Neck Corset Hiayuloo (Recommended by Kazuya Ieshi, a Judo Therapist) Neck Pain and Shoulder Pain Relief Goods, Neck Supporter, Straight Neck Pillow, Neck Stretcher, Neck Keeper, PC Work, Telework, Smartphone Use, Commuting, Sleeping Problems, Housework, Childcare, Neck Collar, Neck Pillow, Father's Day, Mother's Day, Anniversary, Birthday, Respect for the Aged Day, Present, Women, Men, Celebration, Unisex, Washable Cover Included (M) No comments needed, instant purchase is welcome. Black M size ✅ [Improved Velcro Version] [Relieves painful neck stiffness! Keeps a posture that is not tiring even for long periods!] When using a smartphone or computer, you tend to concentrate for long periods in the same posture, causing the muscles at the back of the neck to tense up, leading to neck and shoulder stiffness. Wearing this straight neck supporter prevents excessive forward tilting of the neck unconsciously, and a significant change in posture will appear! The straight neck pillow firmly supports the head and guides it to its original correct posture, thereby reducing neck and shoulder stiffness. ✅ [For a beautiful neck posture! Just 15 minutes a day!] Beautiful impression is all about posture! Because you tend to have a posture that thrusts your face forward, it gives people an unattractive impression. Just by wearing this neck supporter, your neck won't droop downwards, so your posture will look neat, and not only will you stretch your neck, but your appearance will also improve! Just 15 minutes a day! Let's get into the habit of correct posture with a neck relax pillow. ✅ [Comfortable fit based on ergonomics! Perfect fit!] With an ergonomic wave design, the neck stretcher has angles in the front and back, fitting the jaw and collarbone line! The neck collar features a soft fit that makes you forget you're wearing it! In addition, it achieves a perfect balance of outstanding support and softness, making it a shoulder pain relief product that is not burdensome even with long-term wear. ✅ [Easy to put on and take off and adjust! Easily anytime, anywhere!] The adjustment of the stretch goods is easy with Velcro, and Velcro that does not easily get tangled in hair or clothes is used.