My nephew has a kids version of Zoo York swimming trunks. I bought them at an outlet for like $7 bucks so I wasn't surpised when they started falling apart at the waist after about 10-15 wears. They lasted a good summer so I can't complain.
They were 100% polyester which is pretty common for swimming trunks.
They were 100% polyester which is pretty common for swimming trunks.