“As someone who has climbed mountains, I’ve had to improve the grip on the bottom of a shoe or two,” Michael Sawyer of UltimateKilimanjaro.com says with a laugh. “Just take a rock, nail file or ...

The Standard's journalism is supported by our readers. When you purchase through links on our site, we may earn an affiliate commission. Ever looked down to find your shoes talking to you? No, not in ...