New BalanceBoys Sweatpants - 4 Pack Active Tricot Boys Joggers Athletic Pants Kids Activewear Pants with Pockets (4-20)

What size is appropriate for weight 130lbs, height 5'3"?

Do these have zipper pockets?

What material are they made out of ?

If my son barely wears a 5t in sweatpants, should i order the 4 or 5-6? he’s taller than the average 4 year old. i’m getting mixed reviews on sizing.