Time to replace

I have been using my safety boots for a lot of walking recently as they have better grips than either of my pairs of walking boots, which with the mud around at the moment is a good thing. The sole of one though has started to come away, so time to replace it.
I ordered a replacement pair online and then forgot that the expected delivery date was today so I missed the postman when he tried to deliver them. I've been online to arrange a redelivery for Monday.