When most of us look at clothing one of the first choices is always the high end brands, and what could go wrong with a company known for quality? However when you really start wearing these articles primarily Ripstop, or anything with elastic they will inevitably start to deteriorate. And most of us have ripped a seam, or snagged a limb on a tree branch, but who here has done the hard alterations? The hard alterations are an unfortunate variable that should be addresses, so I'll dive in.
When it comes to wearing a uniform, or clothing article repairs will have to happen, and you can save yourself some heartache if you think about it off the bat. Some repairs are almost impossible with a housewife sewing kit, and if you look at uniforms from decades past you see why that's important. Uniforms like the WW2 Pattern HBT's with the tack buttons ( snaps for the USMC HBTs), and zippers are very difficult to replace quickly, and efficiently with a sewing kit often needed a seamstress/tailor. That being fairly problematic if your supplying your articles out of pocket, and looking for longevity. Think about keeping your gear maintainable, and think about the cool factor last.
No fabric is made equal, and all have some merit. However think about your environment. Your uniform camouflage is likely catered to your environment, so why shouldn't the material? Ripstop isn't ideal for Artic conditions, as Herringbone Twill (WW2 USMC uniform) isn't ideal for the tropics, and so on. Now that being said Herringbone Twill is a stronger fabric in my experience than ripstop, and easier to maintain, but thicker and hotter. You can field maintain these two very easily (and others), but some aren't feasible to fix long-term (looking at you elastic).
Think about what you want out of your gear before you buy it, and think about how to maintain it. Your clothing is an investment, and the old adage "keep it simple stupid" holds true to this, but no one I have seen has brought it up. So with all of that learn to sew if you can't, and start thinking about weak points, and how you mitigate that.
Trial different fabrics, and think about if you really need that zipper/elastic crotch
Something else to add to the fabric portion is NIR compliant. Some material like stretch fabric on combat pants, and some lower end nyco/polyco is not NIR compliant and will glow like a chem light under nods if hit by an IR illuminator. One misconception is that the fabric that is not compliant will just glow naturally under IR, but that's not the case. It has to be hit with an IR illuminator. Same way that our longhouse patches are. That being said, if you're trying to hide somewhere and you choose to not use IR reflective patches for concealment, and you attempt to be conscious of your IR spectrum reflectivity, but you don't wash your clothes properly or invest in proper mil spec nyco, it's all for nothing. Test stuff like your tarps, jackets, spray painted gear (if you do that), tents, etc. Cheap items from overseas tend to glow whereas domestic more expensive materials will not. The stretch used in cryes still glows though, so take that for what it's worth.