Originally Posted by
funkydrum
The cold weather kit has a neoprene sleeve for the hose and a rubber cover for the bite valve. Both of these tend to freeze up in colder weather...
Ahh.. well I own a Thermobak which only has the neoprene sleeve on it and I think the drinking tube is charcoal or black so kind of hard to check inside the tube it it's having a funky party and I'm not invited.