SouthpoleMen's Active Fleece & Tech Woven Cargo Jogger Pants

do these pants have stretch? i wear a size 42-44 wat size should i get

5'9" 160-170 lbs., thinking about getting a large. Do these run small or big?

I am 6' 4 foot tall weigh 180. What size should i purchase?

Sellers, why arent there colors in the 4, 5, and 6X sizes that arent black, navy, and gray? or are the always sold out?