i just completed my one month interrail in Europe with one small backpack. I had everything I needed but everyone I met were amazed how little stuff I had with me 😹 :
Outdoorweb.eu - Kånken Ochre - městský batoh - FJÄLLRÄVEN - 78.66 € - outdoorové oblečení a vybavení shop
Fjallraven Kanken Original – outdoorkids.eu
Fjällräven - Outdoor clothing & equipment
Backpacks Fjällräven Kånken Weekender Black | Footshop
Kånken No. 2 Laptop 15" - Kånken
Kånken
First time one bag - 16 day Europe trip with a 15 inch Kanken : r/onebag