Hiking backpack: The Osprey TALON 33 L/XL has a comfortable ventilated Airscape™ back system that is overlaid with a durable mesh. If you’re into trekking, you’ll love the Stow-on-the-Go System™, which you can easily attach your poles to. All you need to do is put one end of your pole through the loop on the backpack and the other through the loop on the shoulder strap. On left shoulder strap, you will find a stretch pocket for your phone. The Tempest 40 W II S/M is water bladder compatible.