Assertion: crampon | /r/HasProperty | invaluable tool
Facets:
value: for a mountaineer
type: TRANSITIVE-OBJECT
Source sentences:
text: While crampons are an invaluable tool for a mountaineer, they were not used as often as today until the development of plastic-shelled climbing boots, because the straps used to affix the crampons to early mountaineering boots had a tendency to restrict blood flow to the feet of the climber wearing leather boots.
text: While crampons are an invaluable tool for a mountaineer, they were not used as often as today until the development of plastic-shelled climbing boots, because the straps used to affix the crampons to early mountaineering boots (which were made of leather) had a tendency to restrict bloodflow to the feet of the wearer.