500d Construction two generous wand pockets (one on each side) are big enough for most 32oz cylindrical bottles. USGI pattern 1qt bottles are a tight fit and will intrude on internal space. We like the 1qt Hydrapak Recon bottles. hang tab for a water bladder on the inside. if you are using a water bladder, the hose routes out the top of the zipper underneath the zipper hood. quilted padding on the body side with an exposed flat slot pocket suitable for stashing a netbook, machete, or even a lever action rifle. comfortable contoured shoulder harness can be used as a back pocket on our larger packs parachute and cordlock compression / lashing system on bottom dual horizontal compression straps allow you to carry larger items (like snowshoes for example) strapped vertically on the pack.