An oxer is a type of fence used in equestrian sports consisting of two or more jumps placed side-by-side, with the front jump usually higher than the back. Some synonyms for the word oxer used in the equestrian world include double, spread fence, and combination jump. Other more creative terms could include double-bar fence, crossbar gates, or even hurdle wall. While the structure of the jump remains similar, the name of the fence can sometimes depend on the context or geographical location. Regardless of the name, riders must be skilled in judging the distance and height of the jumps to successfully clear the obstacle and complete the course.