Skates should be sharpened every 20–40 hours of skating. This is determined by a number of criteria, including how many times a week a skater is on the ice, the aspects the skater is working on, and the skater's build. Generally, a sharper will be able to get more life out of a knife can't get all the way through the skin and meat to the bone. The best way to care for your skates is by keeping them in good condition and replacing their blades when they become too dull. Skate shops often offer free blade replacements if you present your license or membership card. You can also buy new blades at skate stores or online. The cost varies depending on the brand but generally ranges from $60 to $100. It is important to wear protective gear while skating. If you fall you may suffer a injury that could be serious or even fatal. Protective equipment includes: helmet, gloves, elbow and knee pads. A skate guard may also be used to protect against injuries caused by flying objects. A skate guard is a cover that fits over the top of the shoe and extends down each side of the leg. They are sold as single units or as part of a complete set of protective gear. In conclusion, caring for your skates is very important. It allows you to keep on skating after your work day has ended.