8mm NFPA Spectra/Polypropylene rope packed in a 1000D Cordura bag and 1" nylon strap with plastic side-release buckle allowing bag to be thrown or attached to equipment, boat gunnels, etc.
The 75' is the throw bag of choice for shore-based rescues, while the 100' bag is primarily designed for vertical rescues (i.e. from bridge or ship). The 50' throw bag is designed for rescue from canoe or kayak.