Used once after purchase. Please purchase only if you understand that this is a used item. Instant purchase is OK! ★ The following is a product description 【For neck and shoulder stretches】 This newly developed neck pillow stretches the neck and shoulders, and relaxes them. Just by sleeping on it for 10 minutes a day, the area around your neck, shoulders, and shoulder blades will feel lighter. Sitting for long periods, or incorrect posture while working or studying, can easily lead to neck problems. Neck stretches help you avoid feeling the strain of "smartphone neck" and shoulder fatigue. 【Ergonomic Neck Relax Pillow】 ■ Structure of the protruding surface: The gradient of the protruding surface maintains a 35-degree angle, and the ergonomic curve fits perfectly to the curve of the neck. ■ Load capacity: Designed with a U-shape, it evenly distributes weight, significantly improving load capacity and making it less prone to deformation. ■ Number of acupressure protrusions: 10 protrusions firmly press the area around the neck, spine, and shoulder blades. They relax the muscles on both sides of the neck well. ■ V-support design: The unique V-shaped indentation design gently fits the neck, firmly securing and supporting it. 【Double-sided use】 Considering the use by beginners, the pillow is designed to be easy to use with both sides usable. You can adjust the height of the pillow and the intensity of the stretch according to your own situation. It usually takes 1-3 days to get used to this pillow. This is because it takes time for it to adapt to the contours of the user's neck. Neck pillow specifications: Size: (approx.) 25cm long x 23cm wide x 10cm high. Polyurethane material, soft surface, excellent elasticity and toughness. After use, you can clean it by simply wiping it with a soft cloth.