Has been filled with tap water once to check size whilst full, but drinking hose not used still has the hygiene seal over it. will fit all kriega backpacks......but I think its to long for the R15 that's why I'm selling it £35 inc UK postage
They aren’t too long for the r15 , I have one and it’s a perfect fit. I do recall thinking the same as you the first time I fitted it , but after jiggling around and attaching the top part its perfect
