The first thing you notice when you sling on the Chilcotin is just how good it feels on your back. This is due to the superb design of the Wingman hip pockets that wrap around your hips providing control & stability. These pockets are not just an afterthought, sewn onto the hipbelt, they are an integral part of the back system & cling, limpet like, to your hips. When youve got the Chilcotin on the angled zips on the Wingman pockets make getting at the contents super easy, in fact Id go as far as to say that they are the best designed side/hip pockets around. The fabric used to construct this robust pack is a ripstop nylon with a silicone coating to improve weather resistance. All contact areas are faced with Aeroform monofilament mesh that is air permeable, non-absorbent, durable, flexible & non-compressible, so perfectly suited to sweaty aerobic activities. Arcteryx have used a yoke design for the shoulder harness that allows the pack to sit low on your back fully utilising those Wingman pockets. The Chilcotin is essentially a soft pack that uses a Polyethylene frame sheet to provide protection & stability & a neat horizontal top bar to provide torsional stability, particularly when fully loaded. Four side compression straps keep the load under control & can be extended if you have packed extra stuff. Access to the main compartment is via a long U zip so you can get your stuff in & out easily, & there are two zipped external pockets, one with a key clip. The main compartment houses the 2.0 litre custom Source bladder (one of our favourites) that features a detachable hose for easy re-filling, a lockable bite valve with sternum strap keeper & a glass like lining for clean tasty water. 2.0 litre Source hydration bladder Nylon ripstop fabric Mesh back panel Wingman hip pockets 2 x external zipped pockets