The Rodent Jacket Dermal Insert is designed for use with rodent jackets to help protect externalized catheters, dermal implants, infusion sites, or other experimental applications. The insert provides an additional protective barrier between the animal and sensitive treatment or instrumentation areas while maintaining animal mobility and comfort. Constructed from durable, lightweight materials, the dermal insert fits securely within compatible rodent jackets and helps minimize chewing, scratching, or disruption of implanted devices during long-term studies.