[ad_1] Urban commuters who like to bike, or ride a motorcycle, through all kinds of weather and want a backpack with a special-ops, seemingly-bombproof type feel to it could consider a rigid new pack made by a company called Black Ember. The black material on their new Citadel Minimal backpack is a heavy-duty polyester fabric coated on both sides with polyurethane. The exterior has what company co-founder Chris Gadway calls a “dead face matte finish,” giving the bag’s exterior a stealthy, non-reflective appearance. To help keep the water out, Black Ember used a bonding technique to connect the materials where the zippers meet the main body of the pack. That process involves sandwiching the layers together, along with a type of film, and feeding it into a rolling heat press. “And then it’s a matter of time, pressure, and temperature,” Gadway says. That bonding melds the pieces, which are laser-cut for accuracy, firmly together. Also bonded to the bag a...