Mattress Cover Allergy Relief Twin size 39 x75 x9 Zippered Exercise Balls Fast Set in 5 8 minutes Select Ear:Left Ear Fast Set in 5 8 minutes * 4 x 5 Yards Bx 12 * Specially treated plaster spreads uniformly * Thick creamy texture when wet which allows for a smooth cast finish * Shipping Carton Size: 12 L x 10 W x 6 H 450 lb weight capacity(evenly distributed) * 20 s sleep and allergy relief * All of our covers are laboratory tested and efficient against dust allergens and pet dander * Zippered Mattress Cover * Twin 39 x75 x9 * Six gauge vinyl * Heavy Duty and durable * One cover per package * 100% Waterproof * Fire retardent * Notice to California Consumers: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm * Our allergy relief bedding is designed specifically to prevent dust allergens from becoming airborne * The membrane free tight weave construction prevents dust allergens and pet dander from becoming airborne * No membrane means the most comfortable and cool night