Cave Diver -
This is a common error. The 50/50 is not topped with TLS material - which, as we know is Nylon and about the weight of a good 4 season tent.
Its also not topped with 450 material - which, as we know is about the weight of a good 4 season backpack.
Its topped with a Polyester fabric - not nylon, not codura. It lies between the two in weight and toughness. The butyl rubber center layer is actually lined on both sides with this fabric. Its a somewhat lighter version of the material that laminated to both sides of the CF200 material (to my non-scientific eye, it looks like the fabrics are a bit narrower.) Unlike the TLS or the codura, this polyester does have some stretch. Not CF200 stretch, but some.
My wife has the TLS - very lightweight, very smooth, dries in about 15 minutes, etc. No stretch - it was kind of funky to me after diving in a 7mm with all that mobility. That's why I went with the 50/50. Man, is it heavier that the TLS. Obviously not CF200 heavy, but heavy. Its gonna take a good day for this to dry completely.
Plus - DUI is in the same state as I am - only a couple of hours away - this was the closer. If I have a problem, need a mod or repair, I don't want to send this thing to Canada, Finland, or to the East Coast. DUI is local to me.
The 50/50 now comes with their quick zip - go to their site for a complete descrption - the zipper is a bit longer and slid down to and around the waste a little. It took a bit to get used to, but after donning and doffing 4 or 5 times I got it together.
However - what I do not like with this new zipper design is the stiffener they placed in the bottom of the torso. I'm not sure if its there to help support the wrap-around zipper (likely) or if all 50/50's have this. Its sort of like a hoop-skirt effect...there's about a 1" stiffiner going around the circumferance of the torso that makes if a bit blousey. My hips and a$$ are wide enough! My wife's TLS doesn't have it, but she has the older zipper design.
I'm diving my 50/50 on Sunday. Can't wait!
K