River floater is a term used to describe someone who enjoys floating down a river on a TUBE, TUBER, or RAFT. A TUBE is an inflatable device that is typically used for recreational activities such as floating down a river. A TUBER is a person who rides a TUBE down a river. A RAFT is an inflatable boat that is often used for recreational activities such as floating down a river. All of these activities are popular ways to enjoy the outdoors and spend time with friends and family.