This is a somewhat tatty but high quality duffel bag cum rucksack from Helly Hanson.
There are hidden chest straps to turn it into a rucksack. It is made from a high quality strong and waterproof reinforced material.
The original spec. says 50Litre capacity, but I think that is a stretch. more like 45 or so I'd guess.
Some of the material has worn a bit, and the condition of the bag is a bit worse than in the photos - there is some mould on the trim etc. - but this is a high quality bag and it would be a shame to throw it. I think a spray with bleach and a wash in a tumble dryer would make it perfectly serviceable for some uses.
Collection by arrangement from Hollingbury area