There are many different materials used in USB cables. The electrical contacts, the internal wires, and the outer insulation vary in composition from one manufacturer to another. Here are some of the most common materials found in USB cables:
PVC is quite common. It's non-flammable, strong, and weather resistant. However, many manufacturers are moving to TPE, which is even more durable.
TPE is a plastic which has good elasticity and strength. It is environmentally friendly because the waste materials in its production can be recycled. At present, most of the original USB cables that come packaged with smart phones still use TPE.
Nylon is a special fabric material added to USB cables to ensure that the copper core inside the mobile phone cable is not damaged due to external tension. Nylon braided USB cables are not easily damaged. It is very strong, firm, and in the right applications, very attractive.

The Length of the USB Cable
Data transmission and charge speed of smart phone USB cable is related to the length of data cable. In the case of the same material, the shorter the length of data cable, the faster the potential data transmission and charging speed and the smaller the resistance.

The Thickness of the USB Cable
The internal wires of the USB cable can affect charging speed. The thicker the wires, the lower the resistance, lending to a greater maximum current and faster charging performance. However, these wires need to have a woven metal sleeve to shield against magnetic interference. This has the added affect of protecting the wires from physical damage.