Are you looking for a really sturdy cover for your Blackberry 8100 Pearl phone? The Otterbox Rugged case comes with 3 layers of protection for your phone and a tough holster with a ratcheting swivel belt clip to put the case into.
The first layer is, what OtterBox refers to as, a clear membrane. This thin layer envelopes the front and back of your Pearl phone, offering the first layer 
of protection from scratches and it completely covers the keys and screen (but does not cover the trackball). The case comes with a card to be able to get out any air bubbles that may get trapped between this layer and your phone.
The second layer is a hard plastic shell that comes with front and back pieces that fit around your phone.
The last layer is a silicon covering which keeps the previous layers all held tightly together to complete the layering. Its purpose is to absorb shock.
The case has the appropriate cutouts for your speakers, camera, charger, etc. The case also come with a microfiber cloth as well for cleaning the clear membrane piece. The cons of this case are that it is bulkier because it is built to be sturdier and the clear membrane layer covers the camera, which some people may not like, although it is a thin, clear layer. Find this and other Blackberry Pearl Accessorieshere. Get more information on this Otterbox product from the manufacturer here. Find Otterboxes and other Blackberry Accessories for other models here.