hydration

Looking for new hydration pack and chest armour. The old chest armour I have is good but getting a bit small and uncomfortable. I'm looking for something that breathes well as its hot as hell in Brisbane (Australia) but is also comfortable and won't move around when I'm riding approx price...

My mate runs marathons and has been using an american hydration fluid called 'GU'. he swears by the stuff and reckons that we'd all like it as well for XC and enduro especially. It's just started being imported into the UK at last and If what he says is true then i reckon that it's worth a...