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Hydration Packs
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- CamelBakReservoir Gravity Kit$11.93Save 29%compared to $17.00(1)1 reviews with an average rating of 5.0 out of 5 stars
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Related Expert Advice articles
Which hydration pack is best? Learn about reservoir size, gear capacity and other key pack features for cyclists, runners, hikers and more.
Choose a gear capacity
- Runs under 2 hours: 2 liters
- Runs 2-3 hours: 2 to 6 liters
- Runs 3-6 hours: 4 to 12 liters
- Runs over 6 hours: 6+ liters
Decide on bottles and/or reservoir
- Most vests are compatible with both bottles and reservoirs.
- Bottles are easier and faster to refill, usually holding 500 ml of water each.
- Bottles can be soft or rigid. Rigid bottles are more durable.
- Reservoirs hold more water, up to several liters.
Get the right fit
- Follow the manufacturer’s sizing guidelines.
- Choose a snug fit. (Measure your chest while wearing your sports bra.)
- Leave room for adjustment: The straps should sit in the middle of their adjustment range.
- Women-specific vests offer fits optimized for the bust and shoulders.
Learn how to choose the right running pack or other storage solution for your needs. Includes packing tips.
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Frequently asked questions about hydration packs
The top types of hydration packs at REI Co-op include:
Whether you're new to the outdoors or a seasoned pro, check out our wide selection of quality outdoor gear and apparel for your next adventure.
REI Co-op Members get 10% back annually on every eligible purchase, including most full-priced hydration packs. (10% is typical but not guaranteed.)
To earn or redeem rewards, buy a one-time $30 lifetime membership, or sign in as a member. See details about the Co-op Member Reward.