The Osprey Aether Pro 70 is a lighter, performance-oriented take on the Aether platform: 70 liters of capacity at 1787 g, giving a 39.2 l/kg volume-to-weight ratio that's notably better than the standard Aether Plus packs. That's achieved through a simpler build — the main compartment is accessed only through the top lid, there are no front pockets, and the rain cover is not included, trade-offs typical of shaving weight off a full-support pack.
The suspension pairs an aluminum stay frame with a tensioned mesh Airscape back panel, a chest strap, and load lifters. The fabric is NanoFly, a blend of 210D nylon and 200D UHMWPE — a tough yet light material more commonly seen on expedition-grade gear. Two side pockets and dual ice axe loops remain, and the pack is hydration-compatible.
Osprey lists a 99-year warranty, pointing to confidence in long-term durability. The Aether Pro 70 targets experienced mountaineers and alpinists on multi-day trips who need low weight without giving up capacity for heavier technical gear, rather than hikers looking for a fully featured touring pack.
Specifications
Color
Gray
Main Compartment Volume
70 l (18.49 gal)
Total Volume
70 l (18.49 gal)
Weight
1787 g (3.94 lb)
Dimensions ( Height x Width x Depth )
87 x 45 x 37 (2.9 x 1.5 x 1.2 ft)
Back System Type
Tensioned mesh
Frame Type
Aluminum stays
Chest Strap
✓
Load Lifter Straps
✓
Gender-Specific Fit
Men's specific
Main Fabric
NanoFly 210D Nylon x 200D UHMWPE
Fabric Type
Cordura
Main Compartment Access
Top lid
Front Pocket Count
0
Side Pocket Count
2
Ice Axe Loops
2
Hydration Compatible
✓
Intended Use
Multi-day trekking, Mountaineering
Warranty Period
99 years
Volume/Weight Ratio f(x)
39.2 l/kg
Weight per Liter f(x)
25.5 g/l
Pack Style
Mountaineering pack
Hip Belt Type
Padded with pockets
Where to buy
Failed to load offers.
Category context Hiking Backpacks (407 products)
Weight
Standard weight· mainstream zone 941–1980 g· ranked 130 of 196
1787 g
33 g 6050 g
Total volume
High capacity· mainstream zone 38–60 l· ranked 34 of 407