Reddit reviews Big Mango Multipurpose Big Capacity 2 Layers Waterproof Cellphone Nylon Pouch/Belt Waist Bag/Pocket Money Purse for Samsung Galaxy Note 2 Note 3 Galaxy S4 S3 Apple iPhone 5 5s with Clip (Black)

I work in a similar environment. I have to wear steel-toe boots, pants, no jewelry everyday. I risk getting minimally dirty, but I can expect many of the stains to come out in the wash (not all though!). Normal clothes for other managers/engineers at my company is essentially a golf shirt with jeans. The operators I work with all wear t-shirts and jeans.

I definitely second the recommendation to wait a few days before buying many things. However you do need clothes to wear for these few days, figure out what everyone else wears and buy a few "basics" of whatever your co-workers wear. It'll be nice having a few things that you can put on and not worry about the first few days of work.

Once I got comfortable at my job I allowed myself to venture into more variety of clothing, and this is what I found was really important for me:

• a good couple pairs of jeans. I had to buy quite a few more pairs of jeans than I am used to owning because I washing them far more frequently than I used to because of stains/smell. I now have around 4 pairs of jeans that I rotate between for work. I'm working on replacing two of them so I can remove them from rotation because they don't fit or look good. Having good fitting jeans is essential. I really like high waisted skinny jeans for work (although not the super skinny kind, ones that are more like a straight leg).
  
• I love having undershirts. I never wore undershirts before in my life, but H&M's basic tees are amazing for just a little extra warmth if it's slightly too cold in the office area, and they seem to smooth out any bad bra lines.
  
• I've started (slowly) getting more hair clips and things. It's somewhat difficult to find clips that are functional, but still cute without feeling like I'm breaking the intent of the dress code. I have a lot of cloth headbands, and I'm starting to find more cute things to keep my hair up everyday.
  
• Shirts are the biggest pain in my rear. It seems like it's impossible to find a shirt with: sleeves, no lace, no beads/sequins/bedazzling/sparkles/things that can fall off, and cover my entire stomach. I find that I prefer shirts that I can wear tucked in since my job requires me to carry around an extra phone (I wear it on my belt), and that gives me additional access to it.
  
• speaking of belts I have a couple of cute belts, and since my workplace is casual I don't mind having a belt with detailing engraved on the leather or extra studs.
  
• I may be a nerd but I bought myself this pouch to store pens in, because I walk around all day and I carry just a few sheets of paper and it's nice to have pens/flashlight, and having girl pants means no pockets and that just won't do.

I've been looking for something similar to use for backpacking. I want quick access to the phone (so mounted on the shoulder strap most likely), want it protected from branches, light rain, etc. I don't want it flapping around, coming off the strap due to a button or velcro type mounting, and probably a clip of some sort to keep the pouch flap locked down.

I'm looking at cases/pouches like this, or this but I need to ascertain sizes before ordering and I'm not sold on the fastening straps/button thing.

The belt/strap loop options on this one are good.