I wrote a step by step instruction guide to show you how to repair a hole in your merino wool underwear. This guide assumes that you know how to thread a needle and have, at the very least, some basic sewing skills.
This repair is specifically for the crotch of a pair of Icebreaker Beast underwear. This guide should help you repair any Icebreaker, Smartwool, or ExOfficio underwear; or any other merino wool gear.
http://www.hcrbeta.com/how-to-repair-a-hole-in-my-merino-wool-underwear-step-by-step-instructions