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Belay glasses are (in Europe) so common that they are basically now part of the standard gym/crag equipment, just like an autolocking belay device. In some places, it can be rare to see someone wit...
Answer
Belay glasses are (in Europe) so common that they are basically now part of the standard gym/crag equipment, just like an autolocking belay device. In some places, it can be rare to see someone wit...