Provide passengers with head and neck support during long car rides with the side pillow headrest. The pillows are filled with a soft and thick memory foam that is sufficient as a pillow. The pillows can also be raised, lowered, and rotated 180 degrees to accommodate different heights. When you don't need them, just lift them up to save space in the car. Suitable for most vehicles with headrests (the handlebar distance should be greater than 3.75 inches).