Referee like the international professionals. Keep your focus on the game and write directly on these cards. Permanent marker (ultra-fine tip suggested) markings stay put no matter the conditions until you wipe them off with any spray solvent. The factory markings never wash away or fade. Save time and stay focused on the field of play, not your notes! These durable, long-lasting, rewriteable cards eliminate the need for a booklet. When a situation occurs, write directly on the card without the need to open a booklet and/or straighten some paper that might be wrinkled. Later, marks can be swiftly removed with the application of spray-sunscreen, bug spray or a similar spray solvent. ==Red and Yellow Standard Set Cards include frames for: team names, team colors, captains, kickoff, 16 goals OR 8 goals + times, 9 misconducts per team, and a frame for open notes. Cards are re-engineered for vibrancy, comfort, flexibility, and unmatched durability. Cards are optimized for permanent marker use, just like professional referees use in world championship matches.