Jack Wolfskin ACS Hike Pack Rucksack style:1.shell: 100% polyamide; 2.shell: 100% polyester; lining: 100% polyester Imported Well ventilated hiking day pack with mesh back Dual-chamber hiking pack Main compartment and base compartment, 7 pockets Equipped for a hydration system and helmet attachment Trekking pole lashing, rain cover