The ADV Skin 12L Hydration Pack is designed for long-distance trail runs or hikes. Its Sensifit™ construction offers a secure, body-hugging fit, while the Y-shaped structure evenly distributes weight for balance and comfort. It features hydration compatibility with flask pockets and a reservoir sleeve (reservoir sold separately) and multiple storage options including a stretch compartment, side-access back pocket, and trash pocket. Constructed from durable, lightweight materials suitable for varied terrain.