These cables are suitable for both indoor and outdoor applications. Corrugated Armor This design provides excellent mechanical strength, crush resistance, and rodent protection, making it suitable for outdoor use and direct burial. The outdoor and fiber optic options for armored cable further enhance. A typical armored fiber optic cable features a multi-layered protective structure, generally composed of the following layers from the outside to the inside: Outer Jacket: Usually made of polyethylene (PE) or polyvinyl chloride (PVC), it provides excellent resistance to weathering and abrasion. After a PSP moisture barrier is applied around the cable core, this part of cable accompanied with the stranded wires as the supporting part are completed with a PE sheath to be a figure-8 structure.