Bed sheet elastics are really practical; creases look untidy and can disturb your sleep. From now on creases are a thing of the past, because Prym bed sheet elastics pull the bed sheet comfortably taut. Simply attach the separate elastics, sold in packets of three, on the underside of the mattress between the ends of the bed sheets - everything is smooth again. The bed sheet elastics made from white elastic rubber bands are 18 mm wide and are suitable for mattress sizes up to 1.40 metres.