3" Twin/full/queen/king/cal King Premium Memory Foam Mattress Topper (Twin) Instantly makes any mattress more restful, comfortable and supportive in sagging areas of mattress Memory foam reduces pressure points that cause you to toss and turn, so you sleep better 1" shorter on all sides to ensure your sheets still fit over your original mattress and the topper Ships Directly to your Home Via Fed Ex Like Sleeping on a Cloud