As a stepping stone to take your trail running to the next level on shorter distances, Salomon's updated ACTIVE SKIN 4 is now even easier to use and comfier to wear.. The fabrics are still just as soft and breathable, the fit is ultra-secure and the revamped chest pockets provide effortless access to your flasks.. Best for: Trail running, Simplicity. Volume: 4 litres. Weight: 197 g. Activities Bags: Trail running. Dimensions: 37 x 17 x 1 L x W x D in cm. Weight including accessories: 257 grams. Features & Fabrics:. Concept & Technology:. Sensifit™: The construction uses stretch, breathable fabrics and lightweight adjustments to optimize fit and stability.. Designed For Women:. SensiFit™™ designed to fit women's body shape with a specific construction and flattering princess seam, often used in women's blouses, shirts and lingerie.. Back Systems:. 3D comfort. Load Management:. Quick link: This sternum strap enables you to adjust your pack quickly on the fly.. The elastic makes it easier to breathe when you pick up the pace.. bungee elastic cords system. Shoulder Straps:. 3D Airmesh shoulder straps: With a construction that incorporates small cavities,. 3D Airmesh panel allows enhanced air circulation.. Hydration:. Reservoir compartment: This item contains an internal reservoir compartment with a hanging strap to hold the reservoir in place.. Reservoir tube exit: Sewn-in exit port for a hydration tube.. Compatible with 1.5l reservoir. 2 soft flasks 500 ml 28 included. Pockets & Compartments:. 1 back compartment. 1 front zipped pocket. 2 front stretch pockets: Expandable front pockets to store essentials you want to access on the go.. Opening & Closure:. Large opening: Salomon bags have a large opening to make it easy to see and store your gear.. Carrying System:. Custom quiver compatible: Upgrade your pack with the custom quiver, providing quick access and stable carrying for your poles. It's ready to connect.. Custom quiver connecting system: Hooks on the quiver connect to loops on the. Sense packs.. Key holder: This elastic key chain holder makes it easy to pull keys off the bag while remaining safely attached.. Fabrics:. 3D air mesh: Soft 3D mesh adapts to your body on the move, without rubbing your skin or tee-shirt. Larger holes maximize comfort and breathability.. Elastic power mesh: Highly stretch and breathable fabric that adapts to the body.. Fast wicking fabrics: Improving quick drying and moisture management, these light. fabrics deliver top performance, comfort, and odour resistance.. Materials:. Back body: 100% Polyester. Body: 100% Polyamide. Back insert: 89% Polyamide, 11% Elastane. Body insert: 88% Polyamide, 12% Elastane. Lining: 100% Polyamide