The Osprey Nimsdai Mutant 90 is a mountaineering pack made to perform on the world's highest peaks. Developed for Nepalese mountaineer Nirmal 'Nims' Purja MBE and tested on his historic 2020 winter ascent of K2, this streamlined climbing model offers superior fit, form, and function.
Its narrow profile and close-to-body carry let you climb unrestricted. A sternum strap across the chest keeps the shoulder straps secure while the padded hip belt distributes weight evenly. Equipped for demanding expeditions, the 90-litre capacity ensures room for all your mountaineering kit. Features include helmet, crampon, ice axe, and rope attachment points, enabling fast access to your climbing gear. Glove-compatible buckles and a snow-shedding back panel stand up to mountain conditions.
Constructed from 210-denier NanoFly: the recycled fabric is bluesign approved and has a PFC-free Durable Water Repellent finish. Boasting an impressive strength-to-weight ratio, it delivers uncompromising performance in a low-impact package.
Materials
210 denier NanoFly high tenacity recycled nylon
PFC-free Durable Water Repellent (DWR) finish
Global Recycled Standard (GRS) certified
Fabric is bluesign approved
Features
Snow-shedding back panel
4mm LightWire frame
Adjustable low-profile shoulder straps with load lifters
Adjustable sternum strap with whistle
Adjustable hip belt with integrated gear loops
Removable lid
Dual zipped pockets
FlapJacket cover for lidless use
Under-lid rope attachment
Main compartment
Internal compression system
Internal hydration sleeve
Side pockets sized to fit oxygen canisters
Quick-release side compression straps
Removable multi-position ski/climbing helmet carry net
Dual ToolLock ice axe/walking pole attachments with bungee tie-offs
Front crampon pouch
Glove-friendly buckles
Grab handle
Specifications
Capacity:
S/M: 88 litres
M/L: 90 litres
Weight:
S/M: 2.03kg
M/L: 2.11kg
Dimensions:
S/M: 81 x 42 x 33cm
M/L: 86 x 42 x 33cm
Delivery & Returns
UK Delivery
Express Delivery
Order by 1pm (GMT) Monday-Friday for same day dispatch with express delivery.
Express orders placed after 1pm (GMT) on Fridays will be dispatched on Mondays. Orders placed on Saturdays or Sundays will be dispatched by Tuesday.
This option is only available when all items in your order can be sourced from our warehouse.
This service is only available to standard UK postcodes. Express delivery is unavailable for the Channel Islands, the Isle of Man, the BFPO, and the Scottish Islands/Highlands.
Economy Delivery
If items in your basket need to be sourced from a shop, they will be dispatched in 7 working days. This delivery option is always free.
UK Delivery Times
You’ll receive items dispatched from our warehouse within 2 working days. If we have to source the item(s) from one of our shops, delivery will take up to 5 working days.
Looking for a delivery option that’s not listed? Call our customer service team to discuss on 0808 164 0600.
UK Delivery Methods
Spend over £80 to get FREE delivery to standard UK addresses (including Scottish Islands/Highlands).
Free delivery is available for all orders sent with economy delivery.
In the UK we use DPD Local and Royal Mail to deliver our parcels. If your parcel is small and of low value, we will send it via Royal Mail Tracked 48. Other items will be sent via DPD Local. Physical Gift Vouchers are sent with Royal Mail 1st Class. We will send you an email once we have packed your order. Further tracking information will be sent directly from the courier.
Delivery Prices
Parcel / Destination
UK (excluding UK Islands)
Channel Islands, Isle of Man, Northern Ireland and BFPO
Shipping may take up to 2 days to deliver to Scottish Islands/Highlands.
Please note that a signature is always required upon receipt.
If your address is in a VAT free area, e.g. Channel Islands, VAT will be removed from your order total before payment is made.
Customers are responsible for the cost of all postage charges.
Free Click and Collect In-store
Free Click and Collect is available for all products on the website. At checkout, select Click and Collect as your delivery option. Then, choose the most convenient store to collect your order from.
You will receive an email to confirm your order. You will get a second message when your order is ready to collect.
Items in stock at your chosen store should be available within 24 hours of ordering. If we need to take items from another store or warehouse, it will take between 2 and 5 working days before they are available to collect.
International Delivery
Delivery timeframes for non-UK delivery vary depending on location, and take between 2 – 9 days. Similarly, non UK delivery charges start at £13 for Europe and go up to £30 for Southern hemisphere regions. For more detailed information please visit our international delivery page. Please note that the prices we quote on this page are for standard deliveries, i.e. parcel weight and size restrictions apply. For non-standard deliveries, e.g. skis and snowboards, our customer service team will contact you once you’ve placed the order to discuss any additional payment required.
Returns
Returns must be made within 30 days of receiving the goods, and we will issue a refund within 7 working days of the goods being sent back to us. When you receive your order there will be a returns form inside, so please complete this and send back with the returned goods. Return postage must be paid by the customer for unwanted goods, and we offer a variety of ways for you to make a return e.g. taking to one of our stores free of charge, or Post Office drop off for £2.50. For full details please visit our returns page.
Free delivery on orders over £80
