XL Twin Bed Vinyl Zippered Mattress Cover 39" X 80" X 9" Vinyl Anti-Bacterial Treated -Ideal for allergy sufferers -Rip-resistant Electronically welded seams -Waterproof even at seams Makes no crinkling noises -Wipes clean with damp cloth Fits all standard twin Beds 39" x 80" x 9" College Dorm Size Keeps mattress dustproof and spotless -Retards mildew, mold, rot and fungi -5 Gauge vinyl