The Irvis Front Sections by Petzl are a pair of front parts of the Petzl Irvis crampon. These front parts can be used to replace worn out front parts. Optionally, you can combine the front part with a rear part of another Petzl crampon (models from 2016 onwards). This way you don't need to buy a completely new pair of crampons and you get crampons for skiing and glacier touring. The horizontal front points make for a good load capacity on hard snow.