Performance, durability and rugged aesthetics are at the forefront of the SanDisk Extreme SSD. It consists of a rigid ABS core with a silicone exterior that is water-repellent, dustproof and protects against damage from impact. In addition, the silicone is silky smooth and has a pleasant feel. The recess for a carabiner and the discreet perforated pattern give the SSD a distinctive look with high recognition value.