Osprey Seral unisex 7L biking hydration lumbar pack with 1.5L reservoir. Designed to go fast, it is a bike-specific lumbar pack featuring an internal hydration reservoir. Complete with the essential features for a day on the trail while staying out of the way during the technical phases of your ride, it is an excellent lightweight companion for a time in the saddle. It features a ventilated AirScape back panel, providing comfort and airflow throughout, whilst the ventilated mesh hip belt with pockets gives a close and stable fit. Dual compression straps on either side further improve the pack's fit and stability during active riding. Inside, a specially designed Hydraulics Lumbar 1.5L Reservoir sits inside a sleeve, allowing plenty of space to store clothing, snacks, and tools. The reservoir hose wraps around the body and magnetically attaches to the hip belt, remaining out of the way until it's needed. A front-panel pocket provides some organization, including a scratch-free pocket for electronics or glasses, and a mesh pouch with a key-clip. Finally, the