What were those pants?
 

I saw a rider wearing what looked like sweat pants except they had cargo pockets and what looked like velcro straps to close off the ankles. They were synthetic. Anyone know what they could be or where I could get some? Thanks.

Maybe get a pair of sweatpants, and have them altered, add the pockets .. etc.

Alterations is a common Home Business , Often .. just look out for a sign in a Window.

Just google "cargo sweatpants" - there's millions.

I would never ride in sweat pants - too heavy, bulky & baggy