The brainchild of Herman Lijmbach and Jasper de Leeuw, innovative bag company Solid Gray prides itself on crafting progressive yet functional designs. Strong and lightweight, each striking profile is an ornament in itself and designed for those looking for something a little different with their bags. Having produced the remarkable folding backpack, the team join forces with speaker makers Case of Base on another unique design. Nodding at the make-up of a life-size amplifier, the angular backpack boasts various speaker inserts on its panel, while the all-black matte hard shell offers extra protection and sleekness. Head over to the brand’s website for more on Solid Gray and keep a lookout for the collaborative piece to hit selected retailers in the coming months.