A: Hi Jane, the top of this protector is: 79% Nylon / 21% cooling Polyethylene Knit Jersey. It is backed by a TPU Laminate layer for waterproofing. The sides are: 100% Polyester mesh knit. Thank you for your question.
A: Hi Muntz, this protector fits mattresses up to 18 inches tall. Thanks for your question.
A: Hi Tam, this protector does not have a zipper, it goes over your mattress like a fitted sheet.