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Enduro mountain bike racing is grueling combination of cross-country and downhill riding. It requires strong legs, big lungs, and serious disregard for personal safety. Fortunately, the Osprey Zealot 15 is here to help tote the necessary gear when you’re moving fast.

A racing pack must ride stable and close. The Zealot 15 boasts Osprey’s BioStretch™ harness and hip belt to connect the pack to your body. Upper compression straps hold the load and specially designed baffles in the 3 liter Hydraulics™ reservoir reduce liquid movement to increase pack stability at high speed.

Access to the main compartment comes from a zippered backpanel. This allows you to grab gear without interference from gear stored in the front panel mesh pocket or your helmet when it’s anchored to the LidLock™ carry system.

Additional storage options include stretch mesh side pockets, secure zippered hipbelt pockets, and a zippered external scratch-free pocket perfect for eyewear or other small items. An integrated removable tool pouch rolls out from a zippered lower pocket providing organized access for rapid trailside repairs.

And if a pesky mechanical issue delays you after dark, there’s a blinker light attachment for enhanced nighttime visibility to get you home safely.

Key Attributes

Tool pouch

The integrated removable tool pouch rolls out from a zippered lower pocket providing organized access for rapid trailside repairs.

Additional Features

  • Compression Straps - Dual upper side buckle release compression straps help stabilize the load
  • Stretch Mesh Side Pockets - Dual stretch mesh side pockets allow for external storage for accessible items
  • Main Compartment Backpanel Access - A dual zippered backpanel provides easy access to the pack’s main compartment. This allows easy loading and unloading of a hydration reservoir as well as additional gear organization in an internal stretch pocket.
  • Hydration - Backpanel access to the pack’s main compartment provides quick access to an internal zippered hydration compartment and Hydraulics™ 3 liter reservoir. International version does not include reservoir.
  • QuickConnect™ Included - allows easy disconnect of the hose for faster refilling
  • Harness Pockets - Dual stretch mesh harness pockets provide easy access to energy snacks and other quickly needed items

Carry Information

Atilon foam framesheet

  • Atilon foam framesheet allows dynamic body movement while it spreads load across the entire back panel

Airscape Backpanel

  • Mesh covered ridged foam allows maximum ventilation while keeping the load close to the body

Biostretch™ Harness

  • Mesh covered die cut foam provides an active and contouring fit and ventilation
  • Soft, breathable Spacer Mesh contact surfaces

Air Mesh Hipbelt

  • Air Mesh hipbelt for a breathable and ride stabilizing wrap


  Volume Dimensions Weight
S/M 793 in3 / 13 l 17h x 9w x 9d in. 1.81 lbs.
M/L 915 in3 / 15 l 19h x 9w x 9d in. 1.87 lbs.
S/M 793 in3 / 13 l 43h x 22w x 24d cm 0.82 kg
M/L 915 in3 / 15 l 48h x 22w x 24d cm 0.85 kg
330D Nylon Dobby
330D Nylon Dobby
420HD Nylon Packcloth
Product Manual Additional languages available here �



Zippered Hipbelt Pockets

Dual zippered hipbelt pockets provide secure storage for often needed items ;


Slash Pocket

A zippered slash pocket lined with scratch free, heat embossed fabric provides ideal storage for optics and electronic devices

LidLock™ Helmet Attachment

Osprey’s LidLock™ easily and securely carries bicycle helmets

Blinker Light Attachment

The blinker light attachment strap found near the base of the front panel of the pack allows for quick light attachment for high visibility in the dark

Tool Pouch

A zippered bottom compartment features a removable roll-out tool pouch providing tool organization and a clean work surface for on the trail repairs

Zippered Hipbelt Pockets

Dual zippered hipbelt pockets provide secure storage for often needed items

Front Shove-It Pocket and Full-Face Helmet Carry

A front panel shove-it pocket is designed to carry essential biking gear. The shove-it pocket’s upper quick release compression straps secure a full face helmet while the lower quick release compression straps work in conjunction with side stretch mesh pockets for carrying elbow and shin protection
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This is the almighty pack of packs for an an enduro rider


I use this pack for everthing bike. Comuting, short rides long rides backcountry, and racing. It has never failed. It holds a full out fit for buisness casuale dress codes plus lunch. On race day or long rides with crazy descents it can cary everything needed. For The tool kit is secure, holds everything wanted or needed and sits low so not to affect balance much at all. It can hold 3 liters so the epic summer rides (like my attempt to ride up the Pikes Peak Barr trail) are feasable. Along with the many small stretchy pockets for snacks. All that is cool but common on mtb packs. What REALLY stamds out for me is that I can carry my rigid leg and arm armor plus a full face helmet on my back (wich allows for full speeds after all the climbing and way more comfortable climbs). I hit the ground at 20+ mph broken wrist but pack was fine. Another truly impressive feature of all Osprey packs is the almighty guaranty wich covered every piece of damage from my dog ate it to stupid clipping to plain worn out (all true stories but it didn't matter). I am a hard rider and my equipment feels it. I dabble in enduro racing and love to just ride hard and often and I need gear that keeps up, this pack makes the cut. After 1 year of ownership I can say for sure. This zealot will not give up his Zealot for anything!

Southern Colorado


Excellent pack!!!


This pack is great in my profession. I am an Archaeologist and I work in what is called Cultural Resource Management, we conduct archaeological surveys prior to construction of anything that may impact the environment and any documented or undocumented archaeological sites. My job requires a lot of back country hiking that this pack allows me to succeed at. The size is perfect for hiking through tight vegetation, the weight is light and the build is comfortable. So comfortable I forget it is on! And the ease of access allows me to retrieve my equipment with speed, and it is easy to manage as I am definitely a minimalist when it comes to such. Well done and thanks Osprey!

Portsmouth, VA


Great Product


I used to have a camelbak for biking, but found it was too small. The Zealot has an opening on the back that can be used for a Full-Face Helmet or other things, side pockets, a stash pouch on the top for valuables, and a tool pouch on the bottom that is super convenient (comes with tool roll) the pocket for the reservoir goes the whole length of the bag so that when you open it, the whole back of the bag folds down. You can fit a bladder, jacket/layers, first aid kit and lunch in this pocket as well. There are also hip pouches that are good for a multi tool or leatherman, and two chest pockets on the straps that don't fit much. As always, you have amazing Osprey fit and finish, and it seems that the fabric is durable enough to take a spill on (though I have not tested that yet).




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