Designed to give maximum loft and comfort using 250gsm premium hollowfibre filling. Over 3 times the average filling of a standard mattress protector. It has a 38cm deep fully elasticated fitted skirt to suit deeper mattresses and for a secure fit. Fabric: 100% Supersoft Polyester Microfibre Filling - 100% Anti-bacterial Polyester 250g sqm extra deep fill 38cm deep fully elasticated side skirt Non-allergenic - Protects Against Dust Mites Machine Washable