Google gave me this https://lestersdirect.co.uk/the-original-miners-heavy-duty-rubber-knee-pads-ventilated-leather-straps-97-p.asp

Red Shoes By The Drugstore, Tom Waits

Kinda Blue

The Green Fields of France

Any colour you like

Obvious but deserves a mention

I them wash in the machine with detergent almost every time, I think grit, fungi, bacteria, etc. do more harm than a bit of detergent and they wear through at the big toe anyway. Same with the rest of my kit, I think it lasts longer if the amount of embedded grinding paste is kept to a minimum.

It is a good example of why stats won't ever convince anyone though. Most people who are worried wouldn't get past

There you go, being all pendantic about it

@Mrs Trellis have you been writing in again?