The Windy Wing ponies were released in Year 7 of the My Little Pony line and featured ponies with attached translucent wings and long manes, similar to the Summer Wing Ponies released in Year 6. In addition to a symbol on their bottoms, they also had a small symbol on the cheek or forehead.
The ponies were the size of baby ponies but with slimmer, less chunky bodies. Because the wings are fragile, they're prone to getting damaged.