Wrestling mats are shock-absorbing to provide a safe surface for wrestling, and have markings on them that have specific functions:
Starting Lines: Wrestling begins or resumes here with each opponent behind his starting line and at least one foot on the line.
10-Foot Circle: Small inner circle on the wrestling mat that wrestlers must attempt to stay within to avoid being penalized for stalling.
Boundary Line: A 28-foot circle that marks the boundary. Wrestlers are in-bounds when at least one wrestler has his supporting points inside the outer circle. Control is important when this line is crossed, as it determines the starting position when wrestling resumes. If neither player is in control, wrestlers start at the starting line in the neutral position. However, if one wrestler is in control, he can choose to start in any position: top, bottom, or neutral. Wrestlers choose a position that suits their wrestling style.
Protection Area: The border of the mat, extending beyond the wrestling area to prevent injury.