Gregory Inertia 15 H20

In stock
Pick up in Old Forge store today! (Delivery available or pick-up in Saratoga in 1-2 weeks; call 315-369-6672, x1)
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The Inertia 15 feels minimal, but lets you bring along a spare layer, food, and a headlamp if things run late. The included 3D Hydro Reservoir hauls up to three liters of water to keep you hydrated all day long.

3D foam breathable backpanel

Comfort grip custom molded loop zipper pullers

Dual layer bottom panel for added durability


Soft Molded, 3D Hydro Reservior Included with integrated drying hangar

Drylock Magnetic bite valve attachment system allows for one-handed magnetic buckling of the sternum strap

Quick attach hydration hangar system is compatible with Gregory's 3D Hydro reservoir


    Includes 3D Hydro quick drying, soft molded reservoir (3 Liter) with integrated drying hanger.

    Dedicated zippered hydration sleeve with SpeedClip hydration hangar for a one-handed, snap-and-go connection.

    Die-cut shoulder harness with magnetic sternum buckle and hose clip for the Drylock bite valve.

    Breathable die-cut backpanel and removable webbing hipbelt.

    Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades.

    Top zippered pocket with key clip and front zippered pocket with soft touch liner to protect valuable items.

    Front and dual side stretch mesh pockets for quick storage.

    Custom comfort-grip molded zipper pulls and molded webbing keepers for strap management.


Ideal Fit For        Men

Activity Day Hiking / Hydration

Compartment Access     Panel    

Closure Type      Zipper  

Number of External Pockets        5             

Hydration Compatible    Yes

Hydration Reservoir Included      Yes

Reservoir Capacity           3L

Hipbelt Inclued Yes

Removable Hipbelt          Yes

    One Size

Fits Torso             16" - 21” / 40.6 - 53.3cm

Weight 1.20lbs / 544g

Volume                15L / 915cu in.  

Max Carry Weight            15lbs / 6.8kg

Packed Dimensions         20.1" x 10" x 6.5" / 51cm x 25.4cm x 16.5cm

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