Targus 16" Laptop Backpack - 20L Cypress Hero Business Travel & School Backpack with Padded Adjustable Straps (Grey) - Perfect for Commuting, College & Business Trips

I use this on the commute, it's put up with crowded trains and heavy laptops without issue. The shoulder straps, luggage trolley strap (goes around the handle of a Wheely bag or similar making it easier to carry with other things) and carry handle are made out of a seatbelt style material (guessing to reduce the likelihood of slashing the straps to steal it) yet well padded to aid comfort - I have no problems carrying it several miles a day with around 7-8 KG in it.There are several storage sections, both zipped and not, built into the 'back' of the bag (the laptop section is against your back at the 'front' when you open it) and have a nice mix of sizes for pens, cables, notebooks, etc.The laptop section holds my oversized 15.6" gaming laptop with no problems.I've only taken it out in very light rain so can't comment on water resistance.