Eberlestock F3M Halftrack Backpack

The Halftrack is an extremely versatile and popular 3-day pack.  It features two levels of varying-sized tuck-pockets lining its interior, MOLLE-style Padlock webbing racks inside and out, and a fold-down shelf that can be used to divide the main compartment into upper and lower chambers. It will carry two 3-liter hydration kits, mounted in side pockets, or two 2-liter bladders in side-sleeves if you want to keep the main side pockets free for other gear. The waistbelt features a 5 x 2 Padlock matrix on each side.
A radio rack with large antenna portals is fitted to the back wall of the upper chamber. The pack has a Gossamer polycarbonate frame, is comfortably padded with deep-cut airmesh foam, and is well ventilated.
Features
Load-control compression straps
PALS compatible webbing
Pull-out rain cover
Side-mounted compartments for two hydration systems
High quality load bearing waistbelt and harness system