Freeriding is a style of skiing performed on natural, un-groomed terrain, without a set course, goals or rules. It evolved throughout the sport's formative early years as a contrary response to the highly regimented style of ski competition prevalent at the time. Freeriding incorporates various aspects of riding into a style that adapts to the variations and challenges of natural off-piste terrain, and eschews man-made features such as jumps, rails, half-pipes, or groomed snow. Freeriding incorporates aspects of other snowsport disciplines such as freestyle and alpine. This provides the necessary flexibility for varied natural terrain.