Years ago in the UK/Ireland when I used to mend 1st hubbys work clothes, I used to use a glue called Copydex to apply patches. I'm not sure what Copydex is, it looks like PVA but smells fishy. It would stand up to many many washes, and the patches are nearly as flexible as sewing. Make the patches round or oval, or at least round the corners and they wear much better. Put a barrier like a plastic bag if sticking over another layer or you will stick your legs together.
I shared this trick with many small holding friends and they eagerly took it up. One guy did complain that there were so many patches copydexed on to his jeans that they would now stand up on their own.
Now in New Zealand with 2nd hubby this trick isn't needed as he wears shorts for work year round!
I've taken to mending everything from my Smartwool pieces to rag-towels at home. There's no sense in throwing out something that's still very usable with a little bit of TLC.
The big leap was when a coworker pointed me to some wool-rayon blended thread. I was pretty sure I'd need some fine yarn, but ... there's a thread for that! I'm not thrilled with the plastic content of the 50-50 blend. I'll take a little plastic in exchange for a few more years out of my clothes!
(There's probably a PEP badge in all the mending photos I've annoyed my friends with.)
You know it is dark times when the trees riot. I think this tiny ad is their leader:
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