Olee Sleep 2.5 Inch Gel Infused Memory Foam Mattress Topper with Cover (Queen) 25TP02Q Frankly Speaking, Because of some mistake as below, we offer this. We guarantee No functional Defect. Chemical odor will be gone in 72 hours. we accept all return of product with chemical odor Cover should be washable. seperated from topper There was a mistake in packaging . we did not give enough time to dry the odor out