I probably sent you to this page because you asked me about my work pants or shirt.
The pants I wear for work are 5.11 Tactical TacLite Pro Pants. These are polyester/cotton blend, they have tons of pockets, they are comfortable, and they wear well. I have tried many different work pants over the years and these are my favorite. They come in several colors. For reference I wear the same size in these pants as I wear in Levi’s jeans.
The polo shirts I wear for work are 5.11 Tactical Performance Polo. These are polyester, fast drying, and comfortable. They have pen/pencil pockets on the sleeve. They don’t snag and they wash and wear amazingly well. They still look like new after probably 100s of washes (except the white ones which are a little harder to keep looking like new). They come in 8 or 9 colors. For reference, I wear size large.
You can buy them at Amazon.com (below are affiliate links which means I will get a small referral fee from amazon if you buy them through these links.)
If you live near me, I get both of these locally (in Tampa) at Law Enforcement Supply on Hillsborough Avenue: