I don't know if all of their sport socks come home and rice but mine was only half full of beads/chalk. Otherwise it gives a very nice grip towards the disc, especially in humid and wet grounds.  I accidentally got mine super wet one time and I let it dry off using the heater in my car and it seemed to dry up nice and is still working just fine. Overall Zee's are definitely worth the money, they last for what seems to be a very long time, and their overall just really small and can fit in just about any part of your bag. I just wish it was more than just half full. Otherwise definitely worth the money, I use it a lot, right before every throw.

I picked one of these up at a tournament I won with my earnings leftovers. I didn't use it for the longest time. I like a really tacky grip on my disc and wondered if I'd ever use it. Then, the humidity and moisture of summer came and I have been using this almost every time I go out and play now. Honestly, I can't remember what I did without it. There may be better bags out there, but I'm assuming they all pretty much do the same thing. 

Go get one! If not this one, just pick one you like the looks of and use it. You won't be disappointed.