For years hubby has had a thing about using a man bag but now that he is retired and doing day trips with the "boys" circumstances have changed - like I am not there to put items in my bag - he now finds it necessary to have something to take with him to put all those relevant bits and pieces in so hence he relented and came to the decision that a bag might not be such a bad thing after all.
However it did come with strict instructions that it was not to be a backpack - too hard to get on and off especially with a coat on - it had to be big enough to hold a fold up umbrella, bottle of water, camera, small items of clothing that may need to be removed or added depending on the weather and other bits and pieces. Not heavy, washable, with a good size pocket and easy to access.
With all the above information I spent a bit of time "googling" and found a few ideas. From those ideas I took what I considered to be there best features from each and came up with the following.
I must say that I am pleased with the result and so hubby.
Outside of the bag
This photo shows the inside of the bag with the flap up and the good size pocket.