Older cat...12 years old adjusted to it without hesitation.   Roomy and fit a normal size litter box with extra space to spare.  It is made out of a plastic type material, but this is exactly what we wanted, to avoid absorbing urine and odors.  It is in our laundry room.  It has been very successful in decreasing the amount of litter scatter.   It is a creamy color  - definitely not white.