Yeah it’s hard to find old nylon pants some of the stuff . I seen nylon pants at the stores by its shiny but not smooth it’s a bit rough. I highly recommend the super shiny wet look nylon pants if you want to spend the money.They didn't change the nylon, usually today it's polyester.
And if it's really nylon, then the fabric is much more thinner.
I prefer the old original nylon, too. It's usually more shiny and slippery.
Altough I have a hooded and insulated winter jacket from Adidas, made of very fine woven polyester.
It's so heavily ultrashiny, never seen that before. It really looks and feels like nylon, but much more shinier.
Now I'm searching for the matching pants.