Spiderweb looks like white blankets.
The baby was wrapped in a blanket.
A blanket of something such as snow is a continuous layer of it which hides what is below or beyond it.
The trial was conducted under a blanket of secrecy.
including or affecting all possible cases, situations or people
What I object to most is the blanket opposition to change.
to cover something completely with a thick layer
The ground was soon blanketed with snow.