Whether it's a long distance day-hike or a short overnighter in the hills, this best selling hiking and mountain pack features the new and improved AirZone Centro adjustable back system and an AdaptiveFit hipbelt, ensuring the best possible individualised fit. Designed in a top loader style, this 4-season pack offers all the space you will need for multi-day trips, with the lid extending to add an extra 10 litres of capacity should you need it. Key features include lower entry with a zip out divider, unique tip gripper pole attachments and lash points to attach large items like roll-mats or sleeping bags.  Back System: the improved adjustable airzone centro back system delivers extra ventilation by reducing contact and allowing air to flow freely between your back and the pack. Meanwhile the wrap around hipbelt offers increased support, giving you in return the best possible fit and stability especially over uneven ground.  Features: AirZone Trek+ 35:45 Features AirZone Centro back system AdaptiveFit™ harness Hipbelt pockets Harness pocket Lower entry Zip out internal divider Stretch mesh pocket Expandable volume N6.6 Mini Rip fabric Raincover Chest strap Hydration Compatible Key clip Tip grippers Lash points Ice axe loop Bellows side pockets We say: This is the pack we take on the Camino. Just about small enough to get away with as carry-on and enough space for a couple of weeks walking clothes if packed sparingly.