Designed by human body shape:Sharing pressure of hands to fit your driving needs, protect you neck and shoulder from fatigue. Melting pressure :Relieving neuromuscular paralysis caused by the decreasing of blood circulation Melting pressure :Relieving neuromuscular paralysis caused by the decreasing of blood circulation Button set at the right and left, easy master:Easy to Install&Convenience to Use Auto Armrest Pillow Cushion.No Extra tools needed to install,handy to install on chair&Automotive Central Console Armrest Cushion Pillow ight fit with the armrest box, simple and quick operation.All season Universal Seat Cushion Pillow. 100% QUALITY GUARANTEED