Evutec Aramid Fiber Case for Motorola Edge+ (2020) - Black The Evutec Aramid Fiber Case for Motorola Edge+ (2020) Smartphones. Black version. Features: - Evutec combines strength durability and style into our flagship case the AER Karbon. - Karbon is an advanced composite material made with aramid fibers which are 5 times stronger than steel. - Known for being both strong and light weight Aramid fibers are also used in aerospace and advanced military applications including ballistic-rated body armor.