The Polaris Aquanought Waterproof hip pack is reviewed as part of our Kit Essentials grouptest from Issue 143 of Singletrack World Price: £47.99Capacity: 3LBladder: NoFrom: Polaris, polaris-bikewear.co.ukColours: Black & Green If you’re like me, you’re a middle-aged mountain biker living in the UK who has tried the whole stash-things-on-your-frame Enduro-a-go-go approach to carrying spares. It’s all well and good until you’re halfway into autumn and you go to use your spares only to find that…