A striper arrangement (200) for striping a lawn (1) configured to be arranged on a robotic work tool (100). The striper arrangement (200) comprises a striper mat (10) and a holding arrangement (300) for holding the striper mat (10) in contact with a surface of a lawn (1) and is configured such that the striper mat (10) is movable in upwards and downwards direction； and further configured to bias the striper mat (10) in downwards direction by a biasing force (BF), such that movement of the striper mat (10) in upwards direction is restricted until a counter force (CF) exerted by the striper mat (10) onto the holding arrangement (300) exceeds the biasing force (BF).The counterforce (CF) is the force exerted by the striper mat (10) onto the holding arrangement(300) when the striper mat (10) transits from a convex bent shape to a concave bent shape or vice versa. A robotic work tool 100 comprising a striper arrangement (200) for striping a lawn (1).
