Light and unobtrusive in your pack, the Small REI Co-op Duck's Back rain cover deploys easily when storms roll in. Its seam-sealed, waterproof shell protects your pack and its contents from the rain.

Pack and Bag CoversPack Rain Covers

Seam-sealed and waterproof, the X-Small REI Co-op Duck's Back rain cover packs down small and deploys quickly to let the rain roll right off your pack.

Pack and Bag CoversPack Rain Covers

Easy to fill, pack and clean, the CamelBak Fusion 2 L reservoir will keep you hydrated on the trails, no matter how you choose to tackle them. Its easy-to-use on/off lever helps prevent leaks.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

Easy to fill, pack and clean, the CamelBak Fusion 3 L reservoir will keep you hydrated on the trails, no matter how you choose to tackle them. Its easy-to-use on/off lever helps prevent leaks.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

Compatible with the CamelBak Crux reservoir (sold separately), the CamelBak High Flow magnetic tube trap stows a drinking tube with an easy click. Take a drink without taking your eyes off the trail.

Hydration Tube AccessoriesTube Clips

A streamlined, 1-piece bite valve with fast-flowing, self-sealing, leak-free performance, the Platypus HyFLO is made of soft, taste-free, medical-grade silicone to stand up to years of use.

Pack, Bag, and Case Parts and AccessoriesHydration Pack Bite Valves

Stay cool without slowing down. The HydraPak HydraSleeve 3-liter insulated reservoir keeps your water flowing cold, and it's built tough so it can be tossed around when outside your pack.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

The Osprey Hydraulics bite valve provides a high-quality replacement for your old beat-up standby.

Pack, Bag, and Case Parts and AccessoriesHydration Pack Bite Valves

When your hydration system needs de-funking, the Osprey Hydraulics Reservoir cleaning kit is the only answer: it has everything you need to clean and maintain your reservoir and tubing.

Cleaning KitsReservoir Cleaning Kits

The 1.5-liter Osprey Hydraulics LT reservoir is made for light and fast activities where weight and balance (and hydration) are critical.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

The 2.5-liter Osprey Hydraulics LT reservoir is made for light and fast activities where weight and balance (and hydration) are critical.

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

Stay hydrated on mountain bike rides, hikes or any other outdoor adventure with the 1.5-liter Osprey Hydraulics lumbar reservoir made to fit your Osprey Seral pack (sold separately).

Pack, Bag, and Case Parts and AccessoriesHydration Reservoirs

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