I almost exclusively buy clothes at thrift stores but I’ve given up on trying to source work pants that way so any recommendations that are somewhat affordable (or high quality and long lasting with a higher price tag) are welcome. Can anyone point me towards pants that are:

1. Business casual: 75% of my job is meeting one on one with clients and since I’m still new in my career, I want to portray myself as someone who is knowledgeable, competent and put together

2. Stretchy/flexible: the other 25% is doing stuff like lifting heavy boxes, getting things off very high or low shelves, and occasionally quite literally running across the building to assist in an emergency

3. (And this seems to be the hardest thing to find) have POCKETS: I don’t stay at my desk all day but am required to carry the office phone at all times. Once every 6 weeks, I’m on call and have to carry a second phone with me at all times. I’m up and down from my desk all day and need my hands free when I’m away from it so the pockets have to fit two phones securely, a half pocket that the phone will fall out of every time I get up or sit down won’t cut it

Do pants like this exist? Thank you for any recommendations you have!