Hose design is based on a combination of application and performance.
Common factors are size, pressure rating, weight, length, bending radius, and chemical compatibility.
Hoses are made from one or a combination of many different materials.
Applications mostly use synthetic or natural rubbers, nylon, polyurethane, polyethylene, PVC based on the environment and pressure rating needed.
Other hose materials could be PTFE or FKM, VMQ.