> Every time I imagine climbing the Eiger in hobnail books, my palms sweat. My guess is that they were using Tricouni [1] nails in their boots, by all accounts

> Every time I imagine climbing the Eiger in hobnail books, my palms sweat. My guess is that they were using Tricouni [1] nails in their boots, by all accounts they work well over a different range of conditions to a rubber sole and crampon combination. [1] https://en.wikipedia.org/wiki/Tricouni https://en.wikipedia.org/wiki/Tricouni