Jack Wolfskin ACS Stratosphere 20 Hiking Backpack style:shell: 100% polyamide; lining: 100% polyester Imported 5.51" high 10.63" wide Sporty biking and hiking pack with good back ventilation Suspension system with optimised ventilation Main compartment, 7 pockets Trekking pole attachment, attachment for LED light, rain cover Equipped for a hydration system