Fjällräven Tind Gyro, Frame back pack, 60+30 l
A frame back pack isn't so warm on your back. One speciality with this model is the gyro system which makes the back pack to hang in a vertical position. There's also a lot of possibilities to fasten extra bags or maybe a tent. The frame can be enlarged at the top if you want to carry even more things.
The gyro system make some irritating things like weird noises and unstable to walk with. A high back pack can get you into trouble, look at picture no. 80 in 1997's travel story.