The Active Skin 4L is a trail running hydration vest designed specifically for a women's fit. It features Sensifit™ construction for stable, bounce-free comfort and includes two 500ml soft flasks for quick hydration. The pack has a back compartment and secure zip pocket for layers and nutrition, and is reservoir-compatible with an internal strap and tube exit port. Power mesh and 3D Airmesh enhance airflow and moisture management. It includes a custom quiver for pole carrying on technical routes and has a 4-liter capacity for short to mid-distance adventures.