Using your Bell Crest bike helmet is a breeze. First, adjust the Ergo Fit system with one hand to ensure a snug fit on your head. Make sure the helmet size (Universal Adult M/L 54–61 cm) matches your head circumference. You can attach or remove the visor depending on whether you need to shield from the sun or rain. When riding, the large vents will keep you cool. As for maintenance, simply wipe the shell with a damp cloth to keep it clean. Avoid using harsh chemicals that could damage the polycarbonate shell. Store the helmet in a cool, dry place when not in use. Remember, if the helmet has been in a significant impact, it's time to replace it for your safety.