"side wings" refers to the parts on the sides of something, like the wings on a bird or an airplane. It can also be used metaphorically to describe additional support or protection on the sides of an object or situation. Full definition
They are secured by the 5 - point safety harness; and the deep, softly padded side wings and head support add to your baby's safety and comfort. (preciouslittleone.com)
The car seat's enhanced side wings protect the five most vulnerable areas of your child's body including his head, neck, face, torso and pelvis. (earlymomentsmatter.org)
Passenger side wing mirror is standard across line - up and full wheel covers are also on offer. (auto.ndtv.com)