Features Ardura 21 D HD RS / Ardura 420D Hike in comfort thanks to Freeflow V fresh air technology, giving minimal contact area, and a gap between your rucksack and your back to allow airflow and reduce sweat Stay one step ahead of the elements; don't forget the waterproof raincover if the skies open Hydration pack compatible allowing you to stay hydrated on the moveKeep everything at hand with 30 litre storage, containing a range of supporting, zipped pockets and walking pole attachments Description Product Description Berghaus' iconic Freeflow 30 backpack has been at the top of every serious hiker's kit list for decades and the latest version is their best yet. Improved weight distribution through the hipbelt and an ergonomically shaped backpanel give the Freeflow new levels of fit and comfort. The 30 and 40 liter versions also feature the BIOFIT back system, which allows for on the move bespoke back-length adjustment, giving the user a fine-tuned fit. Available in a range of capacities and with a host of useful features, the Freeflow is the perfect hiking companion, whether its a day in the hills or an overnight trip. After 20 years on the trail, the Freeflow is still one step ahead of the pack.