From D’Addario:

D’Addario’s Custom Series Flat Patch Cables help you optimize pedalboard space by allowing closer pedal placement while accurately transferring the subtle details of your sound. These cables have an oxygen-free coaxial copper conductor with two layers of noise-rejecting shielding, formulated for extremely low capacitance, so your instrument’s brilliance, presence, and character transmit with the utmost transparency. The Flat Patch Cable plugs feature the patented Geo-Tip, which ensures a secure connection with any instrument, pedal, or amplifier. Encapsulated soldering points and molded strain relief combine to deliver the ultimate long-lasting, high performance patch cable.