The new flows use an I-flex strap, its not all one solid piece like the older ones, its now like two straps but they are connected together in the middle (Looks like a capital I). I agree that the older models were heavy, but the new ones are so much lighter. Regardless of the heaviness of the old models, I still have them, and like them. I'll be getting a new pair this upcoming season. Their good, people just like to hate on them.