Renn™ 50L。Based on the visual details, this is an Osprey Syncro 15 hydration pack in the \"Blue Racer\" colorway. Designed primarily for mountain biking and day hiking, it features a streamlined profile and several specialized compartments. Key Features Capacity: 15 literscargo space with a dedicated sleeve for a hydration reservoir (typically 2.5L or 3L). LidLock™ System: A specialized attachment point on the front panel for quickly securing a bike helmet when not in use. AirSpeed™ Suspension: A tensioned mesh back panel that creates a space between your back and the pack to provide maximum ventilation and cooling. Organization: Includes a J-zip front panel organizational compartment with mesh pockets for tools, a pump holder, and a key clip. Raincover: Features an integrated, high-visibility raincover for protection during wet weather Disclaimer :AI used in cover photo all other photos represent the actual item and description