The Replacement Bag Bottom by Ferno delivers an interchangeable base reinforcement panel engineered to renew field ground shielding on professional medical packs. Fabricated from commercial-grade, waterproof PVC composite vinyl, this heavy-duty panel creates an unyielding defensive block against external fluids, mud pooling, and rough street friction. Tailored to fit the precise tracking base dimensions of the Model 5107 and 5108 trauma systems, the durable replacement layer installs securely to protect internal supplies while significantly extending the service life of high-use emergency response fleet equipment.