The TEMPEST 30 XS/S women’s outdoor backpack has a comfortable, ventilated Airscape™ back panel with a durable mesh overlay. If you hike with trekking poles, you will appreciate the unique Stow-on-the-Go System™. On left shoulder strap, you will find a stretch pocket for your phone. The backpack is compatible with a hydration pack. It has a designated space with a mount loop between the back system and the backpack. It also provides an option for the poles mount and the lid-lock mount for a cycling helmet.