Not the WWW net but the net curtain type netting pockets.
My walking trousers all have webbing/netting type pockets which have been annoyed me for a while. My keys etcetera or anything clicky gets stuck in them to the extent where I shredded quite a few of them, mostly the ones with my keys in. Mrs Jimbob came up with an idea which I have to say suits me,
She cut off the bottom part of the pocket, took one of my thinnest dry-bags, and using some dry bag material sewed in a new pocket, which is a bit deeper than the previous ones. They are still aerated at the top (via the netting), are deeper and hold my keys much more securely.
I think the drybag cost me about £3.00, so far three pockets completed and passed my rigourous car key test, with material enough to do three more.
Currently she is working on an Lidl rucksack which I bought a couple of weeks ago, will post up my findings and the solutions to my negatives after she is finished and I have given it a good try. So far I am impressed by the bag. (An Air Streamsys)