Tailored for avid mountain bikers seeking a versatile pack, the 8-liter Siskin delivers a stable, breathable, and exceptionally comfortable carry experience. Equipped with a next-gen reservoir, it ensures you stay hydrated on your longest rides, while its thoughtful features like a separate main compartment and LidLock helmet carrier offer all-day adaptability. Featuring upper-side compression and options for both traditional LidLock helmet carry and full-face helmet carry with compression straps, the Siskin offers the perfect balance of functionality and convenience. Its U-zip main compartment access and front fabric shove-it pocket provide easy access to your gear, while the included Hydraulics LT 2.5 L reservoir ensures you have plenty of hydration for the journey. Designed with bike-focused features in mind, this pack offers just the right volume for any ride, along with main compartment tool organization to keep your essentials easily accessible. The rolled, soft-edged harness and breathable spacermesh contact surfaces of the BioStretch harness ensure a comfortable and stable carry, while the removable 20 mm ride-stabilizing webbing hipbelt adds extra stability when needed. Constructed with Osprey's renowned quality and attention to detail, the Siskin is built to withstand the rigors of mountain biking. Its AIRSCAPE™ suspension system and backpanel provide maximum ventilation while keeping the load close to the body, ensuring you stay cool and comfortable throughout your ride. With its thoughtful design and bike-specific features, the Osprey Siskin 8 is the ideal companion for all your mountain biking adventures. Osprey Siskin 8 Features: Upper-side compression and full-face helmet carry Direct access zip path to reservoir compartment U-zip main compartment access Front fabric shove-it pocket LidLock helmet attachment Blinker light attachment Magnetic sternum strap bite valve attachment Hydraulics LT 2.5 L reservoir included Main compartment tool organization Tech Specs: Volume: 488 IN 3 / 8 L Dimensions: 6.9H X 8.5W X 18.5D IN Weight: 1.654 LBS Fabric: Main & Bottom: Bluesign® approved 100% recycled 400D high-tenacity nylon, DWR treatments made without PFAS