Chris McNamara climbed with all these aiders over various times in the last 10 years on more than 100 big wall ascents, including more than 70 ascents of El Capitan.We also put all the aiders in head-to-head tests in a laboratory setting. Okay, actually the lab was the garage of Chris's parents. Anyway, we put them all side-by-side, stood in them for hours to see which ones were most comfortable and walked countless times up and down in each of them.
How We Tested Aiders / Etriers
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