Using the Klein 60181 Cooling Helmet Liner is easy. Just wet it thoroughly, and you're good to go for up to 2 hours of cooling comfort. Remember, to activate the full cooling effect, make sure it's completely wet. When you're done using it, you can simply throw it in the washing machine for a quick clean. As a maintenance tip, don't use harsh detergents that could damage the fabric. Store it in a dry place when not in use to keep it in good condition. Also, if you notice the cooling effect isn't as strong as before, it might be time to give it a good wash.
