PolycottonCOMFORT: This Mattress Protector is a Perfect Choice if you’re Considering a Comfortable, Soft, Breathable and High Quality Mattress Pad. The Fitted Skirt Elasticated From All Corners Provides a Secure, non-slip Fit and Fits up to 15 Deep Mattresses.MATERIAL: Our Mattress Protector Cover is Designed to Provide Ultimate Comfort. The Top of the Mattress Pad is 50% Polyester?C50% Cotton, and the Filling is 100% Polyester for Some Cushioning; however, it is not waterproof.FITTED & QUILTED: Protects Your Mattress From Unwanted Stains, Dirt, Dust and Dander. No Annoying Noise When Moving Around.TOP QUALITY FABRIC: Polyester & Cotton Top for Utmost Sleep Comfort and Breathable, Great for Allergy Sufferers, Nice & Tight Stitching Pattern.SIZE GUIDE: Mattress Protectors are Available in Twin 39 x 75, Twin XL /Twin Extra Long 39 x 80, Full 54 x 75, Queen 60 x 80, King 78 x 80 and California King 72 x 85. All sizes fit 15 inch Thick Mattresses. Pillowcases sold separately in 3 Sizes.