Designed to do it allβand hold just enough gearβthe Siskin 12 is a mountain biking pack with many of the high-performing features youβd expect from Osprey. The mesh-covered AirScape backpanel provides excellent ventilation and maximum range of motionβgo ahead, get sendy. A LidLock attachment on the front of the pack can store a standard size helmet while side compression straps expand to hold a full face helmet. The main U-zip compartment houses organization pockets for your bike tools and room for a layer, a sandwich, or some light mountain bike padding. Rolled, soft-edge shoulder straps keep the pack stable over technical terrain and ensure no pinching points when full. A dedicated compartment holds an included 2.5-liter reservoir and zippered hipbelt pockets provide easy access to bars during the ride or a bottle opener afterwards.
- Dedicated hydration compartment with included BPA-free Hydraulics LT 2.5L reservoir by Hydrapak
- Full front panel U-zip to main compartment and tool organization
- Magnetic sternum strap bite valve attachment
- LidLock helmet attachment and loop for blinky light attachment (light not included)
- Dual upper side compression straps double as a full face helmet carry
- Zippered hipbelt pockets















Brian Haase –
Plenty of storage plus a water bladder. Stays in place when you need it to. Replaced a Camelbak and glad I did.
J –
Osprey will always be #1 in backpacks/hydration packs. Life time guarantee for all products, of any year.Sturdy build for all your cycling needs. Enough room comparable to a small school backpack
Matt Smith –
Perfect for hydration and storage on a long mountain bike trail through the mountains
Raymond S. –
GREAT LIGHTWEIGHT HYDRATION BACKPACK. I WOULD RECOMMEND GETTING THE QUICK CONNECT KIT SO THAT YOU CAN EASILY TAKE THE HYDRATION BLADDER OUT TO RINSE AND CLEAN. NOT SURE WHY THIS IMPORTANT CONNECTION IS NOT JUST INCLUDED WITH THE BACKPACK.
Efexxar –
Can’t beat a REAL lifetime warrantee!
James –
Good size plenty of space to store stuff. Nice easy to access snack pockets. I like the back it let’s air pass through so you don’t sweat too bad.
Kimba –
No leaks in bladder. Easy to fill. Tons of pockets! Kinda big for festivals but weβll worth the quality.