Designed for minimalist hikers looking for comfort. If it is not as light as a homemade bag with Cuben fiber fabric, the Octal 55 backpack is definitely one of the comfortable models with low weight. Its volume of 45 l is suitable for hikers who must be autonomous for many days between two refueling points and for those who cross passes at high altitude by transporting equipment adapted to cold temperatures. Its maximum capacity is 16 kg, which means that you will have to put light equipment in it; on the other hand, its main quality is that it weighs just 1 kg. In addition, you can remove the rain cover and the top of the bag to further minimize its weight. 
 
(Small)
Dimensions : 66cm x 31.8cm x 26.7cm
Max Carry Weight : 14kg
Volume : 45L
Weight : 1.08kg
 
Material
Pack body : 100D High Tenacity Nylon
Pack bottom : 210D High Tenacity Nylon / 135D High Density polyester
Suspension and frame : Multi-Density LifeSpan EVA foam + 7mm Tubular 7001 aluminum, 3mm Alloy anti-barreling stay & HDPE
Lining : 135D High Density Embossed Polyester