Independent tool and trekking pole attachment loops
Large/small sizes are about 3 oz heavier/lighter and holds 2-3 L more/less than the medium
Removable via girth hitch, adjustable straps that can be positioned at multiple lash points on the exterior of the pack for carrying a sleeping pad, outerwear, camp shoes, etc.
Integrated rain cover in a dedicated external-access pocket that doubles as accessory storage in mild weather
Front U-zip main compartment access panel