This summer, AlpinistLab worked with mountaineer Mingma David Sherpa to field-test our latest high-altitude expedition prototype during his attempt on K2. The climb was halted due to rockfall, unstable snow, and the approaching monsoon, but the pack saw real-world use in one of the harshest mountain environments on Earth.

The 60–70 L prototype was designed and built in our design studio by co-founder and pack designer Michal. Mingma David needed a lightweight, durable, and purpose - built pack for climbing with an oxygen system at extreme altitude. From first sketch to final stitch, the build took just two weeks - completed while the studio was relocating to Norway.

Constructed from Challenge Sailcloth Ultra 400X and Ultra 200X, with Dyneema used for internal compartments, the pack balances strength, weather resistance, and minimal weight. A custom aluminum frame transfers heavy expedition loads efficiently, while a removable EVA foam back panel doubles as an emergency bivouac mat.

Key features include:

• Two oversized thermo-bottle pockets
• Side zippered upening for quick-access essentials
• Interchangeable side compression straps for varied load profiles
• Shoulder-strap bottle holder for fast hydration
• Internal oxygen bottle harness with a dedicated regulator-access
• Weight just over 1100 g

On K2, the pack was used from the approach trek through acclimatization rotations to Camp 1. It carried climbing hardware, personal gear, and oxygen equipment while maintaining load stability and accessibility. Field feedback from Mingma David confirmed the pack’s comfort, abrasion resistance, and functionality under sustained cold, wind, and hazard exposure.

The prototype will now move into the next phase of development.

K2 turned back the summit attempt this time, but the insights gained from this collaboration will help push our designs further for future high-altitude missions.