How to use: Put the knee protectors on your knees, use the AltaLOK Easy On/Off locks to secure them. Make sure the fasteners are on the right side as noted. The Alta STRAP - keeper System will help keep the extra strap from flapping. Attention: These knee protectors are designed for extreme activities, but don't over - stress them beyond their limit. If the pads are damaged, stop using them immediately. Maintenance: You can wipe the knee protectors with a damp cloth. Don't machine - wash them as it may damage the D3O material and other components. Store them in a dry and cool place when not in use.