Osprey
Osprey UNLTD Antigravity 64
Best premium backpacking pack for women seeking ultimate comfort and innovation.
The Osprey UNLTD AntiGravity 64 is a revolutionary women's backpacking pack designed for maximum efficiency, comfort, and safety. It features a women's-specific torso, harness, and hipbelt, along with a groundbreaking 3D Printed Fitscape™ Lumbar for superior support and ventilation. The pack includes an AutoLift System for automatic harness adjustment and a Fit-On-The-Fly™ hipbelt for on-the-go fine-tuning. Constructed with state-of-the-art fabrics and an anodized aluminum frame, this limited-production pack comes with a premium raincover, custom Airporter transit cover, and a convertible top lid lumbar pack.
Owner Satisfaction
4.7
/ 5
Category Rank
137
/ 13317
#137 in Backpacks
Load Range
2555.1125
/ - lbs ( - kg)
Who it's for
- Long-distance hikers prioritizing maximum load-carrying comfort
- Backpackers trekking through hot and humid climates
- Serious adventurers seeking durable, high-performance gear
Who should skip it
- Budget-conscious hikers looking for affordable gear
- Ultralight enthusiasts aiming to minimize base weight
- Minimalists preferring compact, low-profile packs
Performance breakdown
Load distribution
The AutoLift system creates a remarkably stable and balanced carry experience.
Ventilation performance
3D printed lumbar technology provides industry-leading airflow for long-distance comfort.
Customization capability
Fit-on-the-fly adjustments allow for precise, on-trail ergonomic fine-tuning.
Durability profile
High-tenacity ripstop fabrics ensure resilience against the harshest backcountry conditions.
Access efficiency
Clamshell compression design makes packing and gear retrieval exceptionally intuitive.
Versatility
Convertible top lid adds significant utility for shorter summit excursions.
Key Specs
Load Range
25 - 55 lbs. (11 - 25 kg)
Volume
3906 IN 3 / 64 L
Dimensions
15.35H X 16.14W X 31.5D IN. (39H X 41W X 80D CM)
Weight
5.44 LBS. (2.467 KG)
Fabric
MAIN: 210D High Tenacity Nylon Ultra-High-Molecular-Weight Polyethylene Ripstop, PFC-free DWR
Fabric
LINING: 210D High Tenacity Nylon Ultra-High-Molecular-Weight Polyethylene Ripstop, PFC-free DWR
Fabric
BOTTOM: 500D bluesign® APPROVED recycled High Tenacity Nylon, PFC-free DWR
Frame
7076 Aluminum Anodized Frame with stainless steel wires
Features
- Women's-specific torso, harness, and hipbelt for optimal fit and comfort.
- Groundbreaking 3D Printed Fitscape™ Lumbar with Carbon DLS™ Technology for superior ventilation and support.
- AutoLift System automatically adjusts harness length for a stable carry.
- Fit-On-The-Fly™ hipbelt allows for fine-tuned adjustment on the go.
- Clamshell design for easy access and compression.
- Convertible top lid transforms into a functional lumbar pack.
- Includes premium raincover and custom Airporter transit cover.
What customers say
Customers consistently highlight the exceptional comfort and innovative design of the Osprey UNLTD Antigravity 64. The advanced suspension system receives widespread praise for effectively distributing heavy loads, making long treks remarkably comfortable. Users appreciate the thoughtful features and premium materials, which contribute to a highly refined user experience. While it represents a significant investment, the unparalleled comfort and robust construction are frequently cited as justifying the cost, positioning it as a top tier choice for serious adventurers.
Know before you buy
The Fitscape™ lumbar uses Carbon DLS™ 3D printing technology to create a complex lattice structure. This provides targeted support and superior airflow compared to traditional closed-cell foam, which can trap heat and compress over time.
The AutoLift System automatically adjusts the harness length as you tighten the pack, ensuring the load remains stable and properly positioned on your back without requiring manual readjustments while you are on the trail.
Yes, the top lid is designed to be fully detachable and converts into a functional lumbar pack. This is ideal for quick summit pushes or short side trips where you don't need to carry your full 64-liter load.
The Osprey UNLTD Antigravity 64 is rated for a load range of 25 to 55 pounds. Its anodized aluminum frame and high-tenacity nylon construction are specifically engineered to maintain structural integrity and comfort at the higher end of that weight capacity.
The clamshell design allows the pack to open wide for easy access to your gear, rather than forcing you to dig through the top. It also helps compress the load effectively, keeping your gear secure and balanced close to your center of gravity.
No, the Fit-On-The-Fly™ system is designed for quick, tool-free adjustments. You can easily fine-tune the fit of the hipbelt while wearing the pack to ensure optimal weight distribution as your needs change throughout the day.
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