M size The neck support is made of 2cm of elastic sponge, which not only fits the neck perfectly but is also comfortable for long periods of wear. Soft support is incorporated in the center, ensuring the comfort of the neck support while also doubling the support and reducing pressure from the head to the neck. Can be used for desk work, studying, long periods on the Shinkansen or airplanes, and during sleep. Relieves neck fatigue, stiffness, and pain. ✼••┈┈••✼••┈┈••✼••┈┈••✼••┈┈••✼ ✿.•Instant purchase welcome・Silent purchase at midnight OK•.✿ *First come, first served for only one item♬.*゜ *Welcome to bulk purchases, please feel free to comment ♥Free shipping! ・Please understand that items are stored at home and shipped in simple packaging. ・Please check the actual photos for the condition of the product♪ ※To sell at a slightly lower price, we may ship the item without the box due to shipping costs. ・We inspect the products before shipping, but if there are any defects, please contact us "before evaluation." ✼••┈┈••✼••┈┈••✼••┈┈••✼••┈┈••✼ TSB Neck Support Neck Corset (Built-in Support Bar) Cervical Spine Neck Corset Cervical Collar Cervical Soft Thin Sleep Home Use Work Unisex With Dedicated Washing Cover Gray M 17379971. 6