What Our Gearhead(R) Experts Are Saying:"This is the hydration pack I grab for big trail rides. The fit is rock-solid thanks to the winged harness and wide hipbelt, and the included 2. 5L reservoir makes refueling easy. The tool roll is super handy, and I love the quick-access hipbelt pockets for snacks or my phone."Built to match our ambition on the trail, the Osprey Raptor 10L Backpack gives us everything we need to ride longer, faster, and more confidently. The pack's smart organization and rock-steady fit make it a go-to for epic days in the saddle, while an included 2. 5-liter Hydraulics(TM) reservoir keeps hydration just a sip away. With a bike-specific winged harness and AirScape(TM) backpanel, it stays locked in place over rough terrain without sacrificing breathability. Inside, the pack stores our tools, layers, and even a charger for e-bike rides, while external compression straps, a helmet carry, and a sunglasses/goggles pocket round out its all-ride functionality.