Designed for Elite Mountaineers

Crafted in collaboration with Nepalese mountaineer and Osprey Ambassador Nirmal "Nims" Purja MBE, the Osprey Mutant Nimsdai 90L Mountaineering Backpack is engineered to endure the world's toughest mountaineering challenges. This high-performance backpack was pivotal during the historic winter ascent of K2, proving its durability and capability in extreme conditions.

Exceptional Load Carry and Stability

The Mutant Nimsdai 90L is designed to handle superior load carry, maintaining stability when it matters most. Built with a streamlined structure, it delivers a perfect balance of support and flexibility, allowing alpinists to push the limits of their capabilities.

Eco-Friendly Construction

Constructed with bluesign®-approved fabrics, this backpack not only supports your adventures but also promotes sustainable practices. The main fabric is made of 210D recycled nylon grid NanoFly with PFC/PFAS-free DWR, while the bottom is reinforced with 600D recycled high-tenacity nylon, ensuring durability and environmental responsibility.

Customizable for Your Needs

The removable top lid, HDPE sheet, and hipbelt offer customization options to shave weight and increase efficiency. Whether you need to attach extra gear or streamline your pack for a specific climb, the Mutant Nimsdai 90L adapts to your needs.

Features and Specifications

Load Range: 9-27kg
Suspension System:
- 4mm LightWire frame
- Removable HDPE sheet
- Two aluminum stays for V support
- Removable Atilon sheet laminated to ridged EVA foam
- Snow-shedding back panel with stretch-woven mesh over ridged EVA foam
- Stretch-woven mesh harness over EVA foam
Hipbelt:
- Removable for weight reduction or simplicity while wearing a climbing harness
- Stretch-woven fabric over contoured EVA foam, gear loops, and ice gear clip attachment
Additional Features:
- Removable top lid with zip pocket; FlapJacket™ pack closure and stowaway pocket when lid is removed
- SR-buckled upper and lower side compression straps
- Two-buckled ice-tool attachment slots
- Dual deep side wand/snow-picket pockets
- Removable helmet carry net
- Front foam-reinforced shield pocket for crampons or snowshoes
- Dual side ski attachment loops
- Reinforced gear attachment loops
- Lightweight, glove-friendly buckles
- Internal hydration reservoir sleeve
- Two under-lid rope attachments, adjustable webbing strap
- 3-point haul system with dual front and single rear reinforced haul loops

Specifications:

Capacity: 88 Litres (Small-Medium), 90 Litres (Medium-Large)
Dimensions: 81 x 42 x 33cm (Small-Medium), 86 x 42 x 33cm (Medium-Large)
Average Weight: 2.03kg (Small-Medium), 2.11kg (Medium-Large)

We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it!

We’re a New Zealand-owned company, and to bring you the best value, we work directly with trusted suppliers across Asia, North America, and other regions.
This means some items are shipped directly from our international partners.

Orders are typically processed within 24–72 hours, though during busy periods, dispatch may take up to 5 business days.
Once shipped, you’ll receive a tracking number via email.

Estimated delivery timeframe: 1 to 2 weeks, depending on your location and the item’s origin.

For products stocked locally in New Zealand

Orders are typically processed within 1 to 3 business days. During peak periods or public holidays, processing times may be slightly extended. Once dispatched, delivery generally takes 4 to 7 working days, depending on your location. A flat shipping fee of $9.99 applies to all orders under $99, while orders over $99 qualify for free shipping. Tracking information will be provided via email once your order has been shipped.

For further information on delivery procedures, timeframes, and policies, please refer to our Delivery Policy page.