- ✅ 【Medium Size Neck Support with Curve】(Takes less space than Large) for your head, neck and shoulder to fit perfectly & keep your cervical vertebrae in natural curve.
- ✅ 【EXTRA COMFORT】 The Grin Health neck pillow is designed to give you the support you lack with the factory installed headrest. It provides additional support for your neck and head and helps improve posture, reducing muscle tension and stress.
- ✅ 【Widely Used】The memory foam construction and compact SitRight Pro can be used at home, office, car, travel.
- ✅ 【Elastic Strap Adjustable Enough】Elastic strap and adjustable clip designed, would not cause headrest to sag after using for long time, so you can adjust the height of your head pillows.
- ✅ 【Safety】Certified by CertiPUR-US, and OEKO-TEX for durability, performance and content.
The difference only is M size Neck pillow takes less space than L, backrest pillow is Large in both, but headrest is M size fits almost everyone but people who are looking for extra support may choose L size, not sure choose Fit - Most