I use product. ATM it's a redken brand one I'm using which holds my curls really well. I have wavy hair and I don't blow dry or anything, just spray with a bit of water, comb it, let it dry and then put the product through it. Works well with the frizzy bits too. If you have naturally wavy/curly hair, I'd be letting it dry naturally and then using product to hold the curls.