rain cover
Definitions
A protective, waterproof sheet or hood designed to shield an object, such as a backpack or stroller, from precipitation.
A removable cover used to protect outdoor equipment or furniture from rain damage.
Examples
I always keep a rain cover in my backpack to protect my camera gear during unexpected storms.
The stroller comes with a transparent rain cover that keeps the baby dry while allowing them to see outside.
Synonyms
rain shield protective canopy waterproof cover storm shelter rain guard