Osprey Seral 7 Hydration Waist Pack
Be ready for longer rides with this stable waist pack from Osprey. The low-profile Hydraulics™ LS 1.5-liter reservoir helps you stay hydrated. An AirScape™ back panel delivers bounce-free comfort.



- Included Hydraulics™ LS 1.5-liter lumbar reservoir
- Ride comfortably with the bike-specific air-mesh wrap hipbelt and close-to-body AirScape™ back panel
- Dual-zip access to spacious main compartment with glove-friendly zipper pulls
- Internal hydration sleeve with hose routing ports and Hydraclip for fast, effective reservoir hanging
- Magnetic hipbelt bite valve attachment
- Easily accessible zippered front pocket with internal organization and key clip
- 2 zippered hipbelt pockets provide on-the-go access to snacks or phone
- Dual vertical accessory straps secure a chin guard or extra layer
- Side compression straps stabilize pack contents
- Blinker light attachment (light not included)
- Reflective details for visibility
Imported.
View all Osprey Cycling Hydration Waistpacks| Best Use | Cycling |
|---|---|
| Gear Capacity (L) | 7 liters |
| Gear Capacity (cu. in.) | 427 cubic inches |
| Reservoir Compatible | Yes |
| Reservoir Included | Yes |
| Bottle(s) Included | None |
| Liquid Capacity (fl. oz.) | 50.7 fluid ounces |
| Liquid Capacity (L) | 1.5 liters |
| Weight | 1 lb. 2.88 oz. |
| Fits Waist/Hips | 27-50 inches |
| Material(s) | bluepass certified, 100% recycled 300-denier polyester with a durable water repellent (DWR) treatment made without PFAS |
| Number of Exterior Pockets | 2 + main compartment |
| Bite Valve Shut-off Switch | Yes |
| Pack Access | Panel |
| Dimensions | 11.4 x 8.7 x 7.1 inches |
| Gender | Unisex |
| Sustainability | bluepass certified product Contains recycled materials |
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Excellent small bag
I purchased this for rides on my gravel bike. I prefer a bum bag over a small rucksack for riding and this bag is spacious at 7L. I love the design, main compartment, smaller compartment with zip pockets and the two small side hip pockets. I keep snacks in one hip pockets and my mimi electric inflator in the other. The design of the bag's back is both comfortable and breathable, no sweaty back. The pack stability is excellent descending fast rough trails. After 6 months of riding it's still looking good, after a quick wipe down!
Mtb trail rides
Used this bag for a 105 mile bike ride from whitehaven to Catterick didn't miss a beat the bag was the best even had a waterproof jacket on the bag no issues.
Good waist pack
Can’t wear shoulder day hike backpack for next few months. This should be a good alternative for hiking until back to my regular hiking backpack. Attached extra water bottle to side. Like to hike with more than 1.5 liters. Can’t carry everything I normally take but still have the essentials. I hike in mountains outside of Las Vegas this time of year (summer).
Great bag
[This review was collected as part of a promotion.] Exactly what I was looking for. Used for the first time mtb - sat really comfortably, was able to fit in everything wanted. Specifically like the different compartments; big enough to use while still separating items. Have bought for hiking too, and love that the straps on the outside will be multi purpose for me; jacket holder or for my hiking poles. Definitely recommend.
Great bag but …
I really like this bag but even in a light shower everything inside got wet so a water cover would be great to have.
Love the new redesign! Definitely
[This review was collected as part of a promotion.] Love the new redesign! Definitely an upgrade from the previous model. Keep up the good work!
[This review was collected as part of a promotion.]
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