Clothing Mod Recommendations?
 

So my old tactical pants had built-in knee pads. The pants have torn so I removed the pads as they were still good. Any ideas on how I could attach them onto a new pair of tactical pants that doesn't have knee pad "hole" cutout?

https://i.imgur.com/pxRw4zq.png

Easiest solution is to just take the torn pair of pants, rip the stitches holding the kneepad-holder part, and slap the whole kneepad holder onto the new pair of pants. It will look a bit funky if the camouflages are different, but it'll work.

Alternatively, you could pull off the kneepad holders and use the hole as a pattern to cut a new holder into the knee of the new pants. Most every pair of tactical pants has a double-layer/reinforced knee, so you can cut a hole in the outer layer for a pad and still have a layer of fabric between you and the kneepad.

CAT also has a work line that is some of the best ive found. Two styles of pants and winter sets also. All have built in knee padding and tactical belt loops.