The Nathan Reflective Shadow Pak With Race Clips is always there but never felt. Its mesh, gusseted pocket expands to hold any size cell phone, leaving plenty of room for lip balm, keys, money, and other essentials. And its incorporated I.D. card means, in case of an emergency, help will have instant access to your identification, contact info, and relevant medical history. Itís the pak thatís barely there - until you need it to be.