Experience the joy of carrying more with the 3D Freeflow 30+5L hiking pack. Embrace the freedom to bring along all the gear you desire, and easily adjust the back length for all-day comfort, whether you're preparing for a leisurely picnic or embarking on a challenging ascent. When temperatures rise, rest assured with innovative 3D Freeflow technology, facilitating airflow between your back and the pack to keep you cool and prevent sweat buildup. With ample pockets, loading up for outdoor adventures is a breeze. And with all the included features and accessories, including a built-in whistle for added safety, you're equipped for whatever the trail may bring. Berghaus Unisex 3D Freeflow 30+5L Regular Backpack | George Fisher