Using this Incase laptop sleeve is easy. Just slide your 15 - inch MacBook Pro Retina into the sleeve gently. You can carry it alone or place it in a larger bag for added protection. When it comes to cleaning, use a soft, damp cloth to wipe the outside. Avoid using harsh chemicals as they may damage the eco - dyed poly material. Store it in a dry place when not in use to keep it in good condition. Also, be careful not to overstuff the sleeve or the bag it's in to prevent any damage to your laptop.