Salomon S-Lab ADV Skin3 5Set Pack : The Salomon S-Lab ADV Skin3 5Set hydration pack is form-fitting to provide excellent and reliable stability during your run or hike. With fabrics that self-adjust, you'll experience a fit that conforms to your body with comfortable breathability. With the capacity to store extra hydration flasks on the front and other gear in zippered pockets, you'll find everything you need for a successful and healthy run in secure, easy-to-reach compartments. It's the perfect accessory for fast, endurance races. Blaster Valve features higher flow and softer feeling with no leaking. Twin Link eliminates pressure points on the sternum and increases breathing comfort. 3D Air Mesh is very soft and adapts to the body without abrasion on the skin or shirt. 4D Pole holder provides quick and easy access and can also be used to fix a helmet. All Soft Trims prevent chafing and friction to increase comfort. Reflective details increase visibility. Constructed with FDA-approved polyurethane.