Osprey Siskin 12 Backpack with 2.5L Reservoir

Our Price: $78.50 | MSRP: $130.00
Rent From $15.75/day
Demo For $48.00
Purchase New $78.50

We offer rental periods between 2 and 20 days. Items may be previously used. Item may have a purchase option at the end of the rental period. Please see our Terms and Conditions for additional detail.

Use Days
Product Highlights
  • Helmet carry
  • Mountain bike focused features
  • Ride stability
  • 2.5L reservoir included
  • Airscape suspension
  • Biostretch harness
  • Airscape backpanel

Made for biking, perfect for almost anything

The Osprey Siskin 12 backpack is a small, reservoir-compatible pack that can fit your essentials and a good amount of water for your bike ridses, trail running or hiking excursions. A large, main pocket has numerous tool organizers for multi tools or wrench sets. The Siskin shoulder straps and hip belt are designed to keep the pack close to the back, and stable while riding.

Full of Osprey's top details

The Siskin 12 has a main reservoir pocket, a small top pocket and a main pocket with several features for organization. The pack itself is designed with zippered pockets to keep things organized and ensure you can pack all the necessary bike gear. The lidlock system makes for an excellent helmet carry for smaller helmets, while bigger, full face helmets can be packed using the dual, upper side compression straps.

Keep your hydration system from flying around and ensure easy access with a magnetic sternum strap. A small, reflective loop on the bottom allows you to add an extra safety light if needed. All of the materials and the airscape design keeps your pack and accessories well ventilated, even on your longest rides.

Details & Specifications





Water Resistant: 



3 main pockets; reservoir pocket, small top pocket and main pocket 


18.5" x 9.1" x 8.7"




MAIN:900x600D Polyester

ACCENT:210D Nylon Duramax

BOTTOM:420HD Nylon Oxford

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Included Osprey Hydraulics® LT 2.5L reservoir by Hydrapak with direct-zip access
Magnetic sternum strap bite valve attachment
Dual upper side compression straps double as a full face helmet carry
Full front panel U-zip to main compartment and tool organization
Front panel shove-it pocket
LidLock helmet attachment
Loop for blinky light attachment (light not included)
Zippered hipbelt pockets
Zippered scratch-free, heat-embossed slash pocket
More Information
Gender Men
MSRP $130.00
Activity Mountain Trekking/Hiking, Mountain Biking, Trail Running
Equipment Type Packs
Fit Regular
Gear Category Packs, Hydration
Brand Osprey
Size 164 cm
Shipping Highlights

Shipping Notes:

  • Free Shipping for All Purchases Over $75
  • Expedited Shipping Options Available for All Purchases
  • 30 Day Returns For Purchases of New Items

To see more information regarding Shipping, Returns and Cancellations please see our full policy here.

About Osprey

Osprey's Mission: To relentlessly innovate and ease your journey and inspire adventure. Their guiding principles: Innovation. Integrity. Quality. Respect. Stewardship. Since Osprey was founded in 1974, every single product design has passed through the hands of owner and founder Mike Pfotenhauer, who created his first backpack at age 16. And since the start, sustainability has been part of their core values — from building the most durable products possible to launching the All Mighty Guarantee to introducing high-quality recycled materials and better chemistry. Bottom line: They are committed to building innovative, high-performing products the right way — designed to be with you for your lifetime.

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