Quote Originally Posted by Q.G. View Post
Yep, closed cell foam sleeping mats are perfect to craft your own pads.
They come in several thicknesses. Don't take up mositure. And are (relatively) cheap.

I have cut up a few of those too to create custom inserts for various bags and packs. Use pads to put between things stacked in too-deep compartments in regular photo bags too.
Well worth considering if you want to add some padding to a unpadded bag.
Especially cheap if you buy them at a second hand store, $2-$5ea. around here.
More at a military surplus store $10-$20.
I owned a Billingham once & it was a nice bag but not $200 nice. I know! It's a hobby, spoil yourself.