This men’s backpacking rucksack’s new self-adjust back system is far more stable than before due to internal X-frame; can easily adjust back length without taking the rucksack off; lid extends; huge external pockets built into compression system; front mesh pockets; very flexible capacity. But back system feels a little lumpy; very unconventional compression and pocket layout takes time to understand; heavy at 3750g; it’s hard to find a more expensive ‘sack.