We have searched high and low, and haven't found a pannier that compares to the Ortlieb in terms of durability, ease of use, and waterproof-ness. This is the "Classic", and comes with the updated QL2.1 locking system that allows you to easily adapt the pannier to any rack by hand. The black and "Lagoon" (turquoise) models are PVC-free (technically, they're the "Free" versions). All panniers come with a shoulder strap.
Purchase as a single or a pair.