This is a large expedition pack. Liters are approximate based on measurements. Both torso and waist are marked Medium.
The Gregory Whitney features 2 ice axe holders, a side water bottle holster, multiple outside pockets, and a daisy chain to organize gear. The top lid of the pack can be removed and used as a fanny pack. A hydration bladder pocket and port at the top of the main compartment allows a hydration system to be routed on the right side of the Gregory Whitney. (Hydration system is not included). The Gregory Whitney has a side mounted water bottle holster which fits standard Nalgene bottles, and has an elastic cord which fits around the neck of the bottle to help keep it in place. The near-horizonal angle of the bottle holder facilitates access while wearing the pack.