What Our Gearhead(R) Experts Are Saying:"This pack surprised me with its versatility. The ability to switch shoulders and hydration options make it an easy grab-and-go solution for staying hydrated."The CamelBak Arete Sling 8 keeps hydration close and comfort high. CamelBak's thoughtful design includes a breathable 3D Vent Mesh harness and an airy back panel for all-day comfort. The pack's versatile design lets us switch shoulders with ease for even weight distribution. Its recycled materials make it a responsible choice for our adventures, big or small. This bag also features a double-layer stretch overflow pocket for shedding layers or stashing snacks, and compatibility with a 1. 5L reservoir gives us options for longer outings.