The Thermoplastic Polyurethane backing provides an impermeable breathable barrier to protect against stains and spills * Improved jersey knit skirting with reinforced full circle elastic closure to accommodate mattresses up to 22" thick * Provides a clean and hygienic sleeping environment and protects from dust mites and bacteria * Longer terrycloth loops provide a greater surface area for 50 - 75-Percent more liquid/spill absorbency creating a cooler sleep * Fits mattresses up to 22" thick