Product Price Capacity (liters) Frame Material Weight (pounds (lb) or kilograms (kg)) Load Bearing Capacity (pounds (lb) or kilograms (kg)) Number of Frames Adjustable Suspension
Durston Kakwa 40
US
£139.60 33L / 36L / 39L internal; 15L external; 48L / 51L / 54L total Hollow aluminum 770g / 795g / 820g Ultra 200X; 820g / 840g / 860g UltraGrid 45 lb / 20 kg 1

The Durston Kakwa 40 is an ultralight framed backpack with a hollow aluminum inverted U frame, load lifters, and an adjustable hipbelt. It suits lightweight backpackers and thru-hikers who want a sub-2-pound pack capable of carrying heavier loads.

★ Ideal for

With a medium Ultra 200X weight of 795g, one hollow aluminum frame, and a 45 lb load rating, the Kakwa 40 is a strong candidate for the lightest weight framed backpack on the market while still providing substantial load support.

Gossamer Gear Mariposa 60 Backpack
US
£232.67 60 L Aluminum 33.4 oz / 946 g 35 lb 1

The Mariposa 60 is a lightweight 60-liter backpack with a removable closed-shape aluminum frame, load lifters, S-curve shoulder straps, and a pivoting hipbelt. Its multiple torso and hipbelt sizes, spacious storage, and comfortable framed carry suit weekend backpackers, thru-hikers, and long-distance trekkers.

★ Ideal for

At 33.4 oz with a one-piece aluminum frame, 60 L capacity, and 35 lb load rating, it is a strong lightweight framed option for hikers seeking a very low-weight pack without giving up substantial carrying capacity.