Built for bike commuters and perfectly sized for a day's worth of gear, the Half Mass has padding on the back and along the contoured base to protect the contents and provide structure. Inside, a padded computer sleeve accommodates most 15-inch laptops. The main compartment features a drop pocket that secures with a hook-and-loop tab, a mesh pocket, a padded electronics pocket and pen sleeves. The external side pocket stows a cell phone, power cords or a water bottle. The bag's no-slip shoulder strap is fully adjustable, and the stabiliser strap stows away. With a topside carrying handle, a reflective panel for visibility at night and a bike-light mount. Made of 600-denier 100% recycled polyester with a polyurethane coating.