The Impulse is its latest offering,fitting up to 15” laptops. It weighs 1 kg and is made from 300D velocity poly with a 200D water resistant lining (Laptop compartment is 200g brushed nylex).
I like the top zippered opening (no inconvenient flap to unclip or remove), a second full sized compartment for paperwork and a third front ‘organisation pocket for keys. There is a drop down compartment at the bottom front for chargers and cables, and two side water bottle pockets.
This backpack also has a luggage pass through slip over a carry handle on a suitcase – nice thought.
STM gear is well made and the $119.95 price reflects the quality and durability.