Description of Osprey Exos 58 Backpack Thanks to Osprey’s AirSpeed Suspension packing light and traveling fast has reached its full potential. The Exos 58 compression system utilizes super light 7mm webbing while its comfort and breathability rest within the Exos Bio-Stretch harness and hipbelt. With the ability to handle quick day pursuits as well as multi-day/week excursions the Osprey Exos backpack becomes your trustworthy outdoor ally and pack Mule. A fit and comfort unheard of in a one kilo pack. Features: vertical zippered front pockets 2 tool attachments Hydration InsideOut™ Compression Over Skirt Compression Strap Stow-on-the-Go™ Trekking Pole Attachment Top Pocket Removal Vertical Zippered Front Pockets 28x13x12 inches (73x35x30 cm)