Rally 2 pro water bladder?

[Septic]

Has any one got a Rally 2 pro water bladder/camle bak in there jacket
where did you get them from ive had a good look on the net and can only find references to it

 

[Loiq]

army surplus store 3 litre camel back bladder fits or a platypus about £6

when the top pops off in a crash makes you look like you've wet yerself...