ERGONOMIC DESIGN: Contoured design for your head, neck and shoulder to fit perfectly, well designed effectively helps keep your cervical vertebrae in natural curve and alleviate shock attacked when you are driving. 3D ERGONOMIC NECK SUPPORT WITH CURVE DESIGN: (Our new neck pillow with curve design) for your head, neck and shoulder to fit perfectly & keep your cervical vertebrae in natural curve considering medium thickness to offer. Fits all for most cars for medium gap. DIMENSIONS: The size of back support (SitRight Pro 18.11×14.9×5.5 inch) and (Headrest 11.41×9.5×5.2 inch). EXTRA COMFORT FOR CAR DRIVE: The Grin Health car 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 while driving, reducing muscle tension and stress. Safety Certified by CertiPUR-US, and OEKO-TEX for durability, Back Support: SitRight Pro: SLEEK DESIGN - ORTHO WAVE SHAPE - LUMBAR KNOTCH ergonomic design promotes healthy back position for car. It's more flexible and emphasis is placed on for maximum comfort and support while traveling or sitting. Neck Pillow: Maintaining cervical curvature, head and neck and shoulder and fill the gap between the seat. Driving for long time/longer sitting and keep a posture which can easily trigger a variety of cervical problems.