I have a pair of ¾ length lightweight travel pants that I bought about 8 or 9 years ago. I have been wearing them for some time with a patch just below one knee, however, the fabric around the patch has given way, too. I love these trousers as they are really comfortable and have several deep pockets.
I decided to salvage what I could from them. The latest buzzword seems to ‘upcycling’ but you could call it ‘refashioning’, ‘making do’ or just plain ‘thrift’. I cut the lower legs off and was left with a pair of knee-length shorts which just needed hemming. Since they are an existing garment I know that the fit and function of them will be perfect.