Several years ago I bought a pair of handknit, washable Merino wool socks at the local Farmers' Market. Plain denim blue color. Plain stockinette stitch. Cost eighteen dollars, more than I've ever paid for socks before, but I wanted to be supportive.
"Blues" fast became my favorite socks and slippers. I wore them, washed them, and wore them again over and over...until it happened...one heel wore right through!
Yesterday with some yarn, a needle, scissors, and a light bulb, I darned the hole. Or, did I darn the socks. Well, darn it, I'm not sure. But the hole is gone and they are back on my feet.