The purpose of the swaddling blanket is in the name itself. Usually it wraps tightly over the baby body. Swaddling serves the same purpose as a security blanket by helping babies feel secure.
The main difference between the other type of blankets and swaddling blankets are, all other blankets are just covering the baby body but only the swaddling blankets wraps the baby body.
It must have some other factors like good color, good design and smoothness which should provide the friendly as well as the sophisticated environment to the baby.
Blankets should be comfortable for babies. Different swaddling blankets are available with different designs and of different materials.