Weights only : 140g. Safety is the name of the game with this amazing backpack. This light- weight backpack comes in eye-catching vivid colours and doubles as a reflective vest. It is designed for smart phones where it is splash proof and holds both the phone and external power source securely without rattling. It is the perfect companion for anyone active out- doors. It is designed to hold a smartphone and an external power source securely for those who are into endurance sports.