From the manufacturer:
Trekking for a week or more calls for a serious pack. Our plush thermoformed hipbelts and shoulder straps are connected to our sturdy V-stay suspension system to comfortably handle expedition sized loads. This robust pack features WaterTight™ zippers, DWR coated fabrics, and a reinforced bottom to repel the elements.
Technical Features- Moisture-resistant outer face fabric
 
- DWR finish (Durable Water Repellent) helps bead water from fabric surface
 - Occipital cavity provides unrestricted head movement
 - Double-layered fabric pack bottom for added strength and durability
 
- Interchangeable thermoformed hipbelt
 - Interchangeable dual-density shoulder straps
 - Thermoformed backpanel
 
- Removable, quick-release top lid with integrated hip belt doubles as a waist pack
 
- Six external compression straps
 
- Two external daisy chains
 - Two ice axe keepers
 - Key clip
 
- Kangaroo pocket with drain hole
 - Sleeping bag compartment
 - Two water bottle pockets
 
- Hose clip
 
- WaterTight™ external zippers
 - WaterTight™ full length side zip
 
- 3.1 kg / 109 oz
 - 77 L
 - 86 L max
 
            
            
                    
                
