Realy disappointed in this item, as it states it is a LAPTOP backpack, I assumed it would have some additional padding with it to shield the laptop from harm whilst outside.
It is quite big an spacious to put things in, I fitted 4 netbooks in there. It is also quite light, the padding on shoulders and around the waist is good.
I think the material it is made of looks as though it would be waterproof, although it doesn't have any zips on the top, it is some fold-over and clip design which is a little odd and I felt like a turtle with it on my back sometimes!
I sent this back due to the lack of padding, it wasn't for me but is a nice enough bag.