Its extremely comfortable except it is so snug on the back that it doesn't breathe and i have never sweated on my back so much before because of this. It is really off putting for this reason. I am not sure what this airflow is achieving because it is absolutely rubbish.It would be nice to have some horizontal platform on the bottom so there would be some airflow. Now i just keep my hands there. Very inconvenient. All thr back is discoloured because of the moist just after few wears.Would be nice to have an option for waist belt.I am not sure how could they not know.I’m very happy with this backpack, it is the right size with just the right amount of pockets. It rained heavily on my first time of wearing it and I was a bit concerned that it might not be waterproof but I need not have worried as my belongings were perfectly dry. Love the colour too.Always a good make of product look forward going to use it when walkingWas expecting a better quality from beghaus as I've bought there coats for years but unfortunately there is better out there for the same priceGreat size for main compartment and excellent value for money. Quality zippers and convenient storage compartment.