I’m curious how they implemented this. The air completely has to be replaced with nitrogen, no breathing in a mix of nitrogen and outside air, no oxygen at all. People that enter confined spaces with no oxygen pretty much just drop and are dead quickly, so this doesn’t sound like they did it right.

Doc Martens are now Chinese made IIRC and don’t last.

Solovair is the the company that used to make Martens and you can still buy that style there. I hear they’re much better than Martens, but also occasionally a mixed review that they didn’t last very long.

I’ll offer a mixed review for carhartt…while they used to be strictly workwear, they’ve started putting up retail spaces in designer clothing areas. Prices have shot up. I had a belt from them that fell apart pretty quick with normal wear. Got a work shirt that’s doing pretty good though. IMO they’re headed down the same road as a lot of brands that get popular - price hikes with decreased quality.