Perfect for technical outings where speed and stability are critical the Fluid 18 Daypack is your weapon of choice. The Mountain Hardwear Fluid 18 Daypack is the most popular pack in the Mountain Hardwear line thanks to its lightweight, ventilated design and easy carrying capabilities. The pack is lightweight and ventilated thanks to its CoolWave Suspension system that has a mesh backpanel and lumbar to provide excellent support and ventilation. The On the Fly Compression allows you to adjust the stability of the load while wearing the pack so you can ensure you always have a comfortable fit and you don't have to stop moving to make it happen. There is plenty of storage space in the Fluid 18 with its large main compartment and multiple pockets all over the pack. A hydration sleeve will allow you to stay hydrated during your adventure.