Using the MET Echo MTB helmet is easy. First, choose the right size from S/M, M/L, or L/XL to ensure a proper fit. Put it on your head and adjust the Safe - T E - Mid Fit System until it's snug but comfortable. For trail rides, leave the snap - in visor attached to protect you from the sun and branches. If you're just riding on the street casually, you can remove it. When it comes to maintenance, hand - wash the comfort pads regularly to keep them fresh. Keep the helmet in a cool, dry place away from direct sunlight. Also, check the reflective rear stickers regularly to make sure they're in good condition for better visibility in low - light riding. And always remember to replace the helmet if it has been involved in a significant impact.