The 2-liter Osprey Hydraulics reservoir is ideal for large-volume packs and long-duration activities.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

The 3-liter Osprey Hydraulics reservoir is ideal for large-volume packs and long-duration activities.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

When it's time to replace the hose on your existing hydration system, the Osprey Hydraulics Reservoir Hose is the answer.

Pack, Bag, and Case Parts and AccessoriesHydration Pack Flow Tubes

This package of 3 Osprey Hydraulics silicon nozzles provide a soft surface for your teeth to sink into when you're hydrating on the fly.

Pack, Bag, and Case Parts and AccessoriesHydration Tube Accessories

The Osprey Hydraulics sternum strap and tube magnet kit magnetically secures your hydration pack's tube out of the way when you don't need it, while keeping it front and center for when you do.

Hydration Tube AccessoriesTube Clips

Tired of the hydration tube on your reservoir freezing on winter runs? Or heating up on hot summer hikes? This Osprey insulated hose and valve cover keep your hydration flowing in all 4 seasons.

Pack, Bag, and Case Parts and AccessoriesHydration Tube Insulator Kits

Personalize your Osprey Ariel backpack with an Osprey IsoForm4 CM hipbelt customized just for you. Dual-density foam can be heat molded to fit your every curve!

Pack, Bag, and Case Parts and AccessoriesHip Belts

The Osprey IsoForm4 shoulder straps personalize your Osprey Aether backpack with a custom harness that offers miles of comfort on the trail.

Pack, Bag, and Case Parts and AccessoriesBackpack Shoulder Harnesses

The Osprey IsoForm4 pack harness lets you personalize your Osprey Ariel backpack with a harness just for women. Personalize your fit and enjoy miles of comfort on the trail.

Pack, Bag, and Case Parts and AccessoriesBackpack Shoulder Harnesses

Personalize your Osprey Ariel pack with an Osprey IsoForm5 CM hipbelt that can be customized just for you. Dual-density foam can be heat molded to fit your every curve.

Pack, Bag, and Case Parts and AccessoriesHip Belts

The men's Osprey IsoForm5 pack harness personalize your Osprey Aether pack with a custom harness that offers miles of comfort on the trail.

Pack, Bag, and Case Parts and AccessoriesBackpack Shoulder Harnesses

The Osprey IsoForm5 women's pack harness lets you personalize your Osprey Ariel pack. Customize your fit and enjoy miles of comfort on the trail.

Pack, Bag, and Case Parts and AccessoriesBackpack Shoulder Harnesses

With no unnecessary frills, the streamlined Osprey Katari 1.5 hydration pack holds only the essentials and comes with a next-gen Hydraulics™ 1.5-liter reservoir for critical hydration on your ride.

Hydration Packs and VestsHydration Backpacks

Carry a few essentials—water, snacks and a multitool—with the minimal storage of the men's Osprey Katari 3 hydration pack, which comes with a next-gen Hydraulics™ 2.5-liter reservoir to stay hydrated.

Hydration Packs and VestsHydration Backpacks