This is a new, unused Timbuk2 Lane Commuter Laptop Backpack in green, 18L.
It fits up to 15-inch laptop in padded interior sleeve, which is also accessible for quick access via a side zip (see photo).
Bag is highly weather resistant with a water-resistant drop-liner interior and a rain fly conveniently hidden in a bottom pocket (see pictures) for heavy downpours.
It is heavy duty and like all Timbuk2 products, built to take a beating.
Reflective material on back (last photo) for visibility for bike commuters
This bag is ideal for a commuter who wants to keep weight to a minimum as the bag is very slimline even when full.