Not mustachian, but they haven't failed me yet: flint and tinder, but I'll be brief, boxers aren't my thing. I'm not sure how long I've had them -- we backed them on kickstarter, back in 2012 apparently. No holes, elastic is still good. Silk screen is pretty worn/gone, but that's okay and its nice they didn't have a tag to come half-our and be scratchy.
Socks though, that's a lot tougher nut to crack. I have XL/wide feet and its tough to find something around a 12 double wide. Its either "one size crushes most" or "you are a size 16" neither of which is much good. Strangely enough the fairly thin, tabi socks off amazon are okay. I also got some carhart socks off zappos which are decent.