This Bontrager Rapid Pack Hydro hip pack is reviewed as part of our Kit Essentials grouptest from Issue 143 of Singletrack World Price: £94.99Capacity: 1.64LBladder: 1.5L IncludedFrom: Trek, trekbikes.comColours: Black The non-hydro version of this bag has been much loved amongst hip pack-ing mountain bikers for quite a number of years. This larger – and bladder toting – Rapid Pack keeps the same stretchy material, which is its secret weapon really. Stretchy material makes complete…