Earlier today I was wearing my new shoes, bought for my daughters wedding in 9 days time, around the house to roughen up the soles before the big day. They are probably the best shoes I have ever owned and I doubt if I would have bought them if they hadn't been half price!
Shiny aren't they. However trying to walk on a carpet in them is like walking on ice; there is absolutely no grip. It was only when I looked at the sole that the reason became clear:
Here is a clearer picture:
Yes, they have parts made by Goodyear who left GP racing in 1998. Now if their GP tyres had as much grip as my shoes it's no wonder they left!