It can be used to protect your indoor carpeting and floors from the dirt of outside.
It also can be used as raincoat of your shoes. Makes the shoes keep dry and warm, even in the rain.
Resist the water, dirt and mud, one size fit most.

Specification :

Size: as show in the picture above, one size fits most
Length: app 35cm (app 13.5'')
Width: app 14cm (app 5.5'')
Material: plastic
Color: blue