Pacsafe CourierSafe 100

The CourierSafe 100 Anti-theft Laptop Courier Bag is a well made, roomy courier-style bag with a padded laptop sleeve that will hold most 15" laptops.  As with all Pacsafe Anti-theft bags the CourierSafe 100 has eXomesh slashguard built-in, it also has a slashproof adjustable shoulder strap with a combination lock at one end so you can securely lock the bag to something.  More details can be found at the Pacsafe website.