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Gregory Inertia 30 Hydration Pack

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Gregory Inertia 30 Hydration Pack

By Luke

Enwild Gear Specialist

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Balancing weight and carrying comfort while also providing 3 liters of on-the-go hydration, the Gregory Inertia 30 pack is an excellent, lightweight option for day hiking.


Balancing weight and carrying comfort while also providing 3 liters of on-the-go hydration, the Gregory Inertia 30 pack is an excellent, lightweight option for day hiking.

The pack has a mesh-covered, ventilated backpanel that cushions weight against your back while also helping to keep you cool and comfortable. Ventilated foam in the contoured shoulder straps and padded hipbelt adds comfort and support. An adjustable sternum strap and load-lifter straps further enhance fit.

In addition to the panel-loading 1831 cubic inch-capacity main compartment there is a large front stretch pocket to keep discarded layers and other gear close at hand. Other features include stretch mesh side pockets, a small zippered and lined pocket that is ideal for sunglasses and electronics, side compression straps, and trekking pole attachment loops. A separate zippered pocket houses the included 3-liter 3D Hydro reservoir. This BPA-free hydration system has a rubberized fill port and a built-in handle that provide convenience when refilling. Three-dimensional construction allows the reservoir to fit more comfortably inside your pack than traditional unstructured reservoirs. A magnetic bite valve delivers an excellent flow rate and secures to the pack’s magnetized sternum strap to keep the drinking hose at the ready but out of your way when not in use.

The Gregory Inertia 30 hydration pack is available in your choice of color options.

  • Mesh encapsulated ventilated backpanel to keep you cool and dry
  • Padded hipbelt and shoulder harness with ventilated airmesh for all day comfort
  • Load lifters on shoulder harness allow you to adjust the pack fit to ride close to your back and keep the pack stable
  • 3D Hydro 3L Hydro Reservoir included
  • Dedicated hydration sleeve with SpeedClip mounting system
  • Trekking pole attachment system
  • Zippered quick access pocket
  • Dual side compression straps
  • Die-cut padded harness
  • Sternum strap with magnetic clip for hydration reservoir drinking tube
California residents: view proposition 65  Warning

Technical Specs

Best Use
Panel Loading
Item Dimensions
20" x 12" x 10"
Fits Torso
One Size
Hydration Compatible
Maximum Weight
25 lbs
Sternum Strap
Yes; Adjustable
1831 cu in
Limited Lifetime
Day Pack
Item Weight
1 lb 12 oz
3L 3D Hydro Reservoir Included

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