'A-Lab | Model D | Waterproof Bicycle & Messenger Backpack with 15'' Laptop Sleeve'

Is the bottom padded? my latest backpack has no padding for at the bottom and all i hear is my macbook hitting the ground when i sit it down.

Can it fit a laptop with this dimensions 15.7" x 10.7" x 0.78"?

I'm looking for a "convertible" bag that's a backpack that can also securely clip onto a bicycle rack. Does this fit on a rack or must it be worn?

Can it fit a laptop with this dimensions 15.7" x 10.7" x 0.78"?