Fully encased 25cm deep side skirt waterproof mattress protector with zip closure to protect the entire mattress. These mattress protectors completely cover and will protect the entire mattress - it covers the top, the bottom and all the sides. The top, sides and the base of this protector are made from 100% knitted polyester jersey which has a soft and smooth feel. The backing is non-rustle waterproof polyurethane These protectors are anti bacterial and the membrane is effective in the prevention of dust-mites and other allergy causing agents and inhibits the growth of both bacteria to preserve long lasting hygienic freshness. Fabric - 100% Polyester jersey Backing -  Non-Rustle Waterproof Polyurethane Machine Washable at 40° 25 cm deep (10 inches) Stretch fabric, zipped fully encased for maximum protection, lightweight and breathable Discrete, rustle free PU laminate allows air to permeate whilst blocking moisture, bacteria, dust mites and allergens * Please note for hygiene reasons this item cannot be returned once opened Single:     90cm x 190cm Double:  135cm x 190cm King:        150cm x 200cm Superking:  180cm x 200cm