Hiking Backpacks / Hydration bladders
Collection

Bladder Hiking Backpacks

Catalog updated 2026-10-08

Replacement water reservoirs and hydration systems 257 bags · 110 brands

For hiking For traveling For men Daypacks For camping For women Waterproof Ultralight Foldable & Packable For cycling Affordable Black Hydration bladders 20 Liter capacity Military & Tactical 40 Liter capacity Blue Sling bags Crossbody For climbing 30 Liter capacity 2 Liter reservoir For running 25 Liter capacity Green 10 Liter capacity 15 Liter capacity 35 Liter capacity 3 Liter reservoir Shoulder For hunting 50 Liter capacity Grey Reflective Gray Fanny packs Unisex 60 Liter capacity 1.5 Liter reservoir 70 Liter capacity Orange Insulated Purple Red Anti-theft Navy Army Green 2.5 Liter reservoir Nylon Canvas Khaki Brown Olive Tan

Best Bladder Hiking Backpacks

# Brand Model Facts Tier Weight See deal
1 CamelBak long neck hydration reservoir brown 9.4 CamelBak long neck hydration reservoir brown Military & Tactical · 3 Liter reservoir $45.95 2.84 kg
$45.95 See deal
2 Mardingtop Black tactical daypack with molle webbing Mardingtop Black tactical daypack with molle webbing Black · For hiking · Daypacks $37.99 0.85 kg
$37.99 See deal
3 Maelstrom ultralight hiking pack 20l Maelstrom ultralight hiking pack 20l For hiking · Ultralight · 20 Liter capacity $31.34 —
$31.34 See deal
4 Osprey Seral 7L biking waist pack black Osprey Seral 7L biking waist pack black Black · Men · Women $97 0.53 kg
$97 See deal
5 SKYSPER Water resistant 15L bladder hiking pack SKYSPER Water resistant 15L bladder hiking pack Men · Women · For hiking $31.34 —
$31.34 See deal
6 The Outdoor Recreation Outdoor Products 2L hydration reservoir bladder 8.9 The Outdoor Recreation Outdoor Products 2L hydration reservoir bladder Affordable · 2 Liter reservoir $12.77 —
$12.77 See deal
7 Bseash 40L waterproof hiking backpack in black Bseash 40L waterproof hiking backpack in black Black · For hiking · Daypacks $27.99 0.65 kg
$27.99 See deal
8 Cascade Designs Black 10 liter dromedary water reservoir 9.4 Cascade Designs Black 10 liter dromedary water reservoir Black · 10 Liter capacity $64.95 0.28 kg
$64.95 See deal
9 HydraPak Contour ultralight hydration reservoir 3L clear 9.1 HydraPak Contour ultralight hydration reservoir 3L clear Ultralight · 3 Liter reservoir $49 —
$49 See deal
10 WATERFLY Hiking backpack 20L water resistant WATERFLY Hiking backpack 20L water resistant For hiking · Daypacks · 20 Liter capacity $37.99 0.62 kg
$37.99 See deal
Nearby sets
For hiking 2 Liter reservoir For cycling For running 3 Liter reservoir For camping 1.5 Liter reservoir Affordable

What a bladder backpack is

A bladder backpack is a hiking pack built around a reservoir sleeve and a drinking tube. The reservoir itself is a flexible water bag that sits in a dedicated compartment against your back. You drink through a hose that clips to a shoulder strap, so you do not stop to pull out a bottle. The pack and the reservoir are sold as one system, not as separate pieces.

How it differs from a bottle-only pack

A bottle-only pack has side pockets or a front stash for rigid bottles. A bladder pack routes water through a tube so both hands stay free on scrambles and steep sections. The trade-off is cleaning: a reservoir needs rinsing and drying, while a bottle does not.

Capacity is measured in liters for the pack and in fluid ounces or liters for the reservoir. A 20L pack might carry a 50oz reservoir, while a 28L pack might carry 70oz. The reservoir sleeve usually sits in a separate compartment behind the main load, which keeps the water weight flat against your spine.

Sizes and details to check

Reservoir volumes in this slice run from 50oz to 70oz, and pack volumes run from 15L to 35L. Colors include blue, black, gray, green, red, navy, and tan. Women-specific fits appear alongside unisex and men's versions.

Look for a tube port at the top of the shoulder strap, a clip or magnet to hold the bite valve, and a reservoir that opens wide for filling and drying. Some packs include the reservoir, and some do not, so check what comes in the box. Insulated tubes help in cold weather, but they add bulk.

Before you buy

Bladder backpack questions

Do these packs come with a reservoir included?

Some do and some do not. Packs sold as hydration packs typically include the reservoir, while others are reservoir-ready and need one bought separately. Check the product details for the reservoir volume, such as 50oz or 70oz, to confirm it is included.

Can I use a bottle instead of the bladder?

Yes, if the pack has side pockets or a front stash. Many bladder packs also fit a bottle in a side pocket as a backup. The tube port and sleeve stay unused, but the pack still carries the load.

How do I clean and dry the reservoir?

Rinse the bag and tube with warm water after each trip, then hang them to dry with the opening propped wide. A reservoir with a wide slide-top or screw cap dries faster than one with a narrow fill port. Do not store it sealed and wet.

What pack size fits a 70oz reservoir?

A 70oz reservoir fits packs in the 20L to 35L range in this slice. Smaller 15L packs usually take a 50oz reservoir. The sleeve dimensions matter more than the pack volume, so check the reservoir compartment size.