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  • Hydraulics™ LT 2.5-liter (85 fl. oz.) reservoir included
  • Upper side compression straps
  • Direct-access zipper path to reservoir compartment
  • Front fabric shove-it pocket with zippered organization pocket
  • LidLock™ helmet attachment
  • Blinker light attachment (light not included)
  • Stretch-mesh harness pocket
  • Magnetic sternum strap bite valve attachment


View all Osprey Cycling Hydration Backpacks

REI membership


Best Use Mountain Biking
Frame Type Internal Frame
BPA Free Yes
Gear Capacity (L) 3 liters
Gear Capacity (cu. in.) 549 cubic inches
Reservoir Capacity (fl. oz) 85
Weight 1 lb. 4 oz.
Adjustable Torso Yes
Fits Torso 17 - 21 inches
Fits Waist/Hips 25 - 51 inches
Material(s) 210-denier polyester honeycomb; 420-denier heavy-duty packcloth
Frame Material Atilon Foam framesheet
Pack Access Front / side
Number of Exterior Pockets 1+ main compartment
Hipbelt Yes
Bite Valve Shut-Off Switch Yes
Quick Disconnect Tubing Yes
Wide-Mouth Opening Yes
Dimensions 17 x 8 x 6 inches
Gender Unisex
Rated 5 out of 5 by from Great short day pack for MTB I have tried out multiple options to fill my need for a lite half day MTB pack. This is by far the best I have used. It is comfortable, breaths well, and holds only what I need very closely to my back without feeling bulky. This is my third osprey pack and their build quality is superb. My only criticism is the bite valve on the older models is easier to lock and unlock, making it easier to deal with if you forgot to open it while riding. I swapped my new valve for an older one and solved that problem.
Date published: 2017-03-08
Rated 3 out of 5 by from Like the pack - hate the bladder Pack itself is great. Nice size. Nice fit. Disappointed in the bladder. Expected it to be like my Hydrapak bladder in that it's easy to flip inside out to dry. Can't do it on this bladder. The neck is too small and it has rigid parts.
Date published: 2016-09-04
Rated 5 out of 5 by from Great day pack I got this pack last year and I love it. It says its for cycling, but I use it mostly for spring skiing and day hiking. As long as you don't need to carry anything except for water and your keys, this pack is perfect. It's extremely comfortable, adjustable, and light. I love the design of the water reservoir and how well it fits in the pack.
Date published: 2017-03-12
Rated 5 out of 5 by from Great for the 20 mile bicycle ride So happy with this purchase just wish the design for filling was different.
Date published: 2017-06-12
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