With a triple layer diaphragm with aerospace grade metal inside two outer layers of PET, a resilient polymer, which greatly increases high-end and midrange clarity and response time.Dual resonant chambers enhance bass and definition. High-quality function matches form with a lightweight aluminium alloy body. The cable of the 1MORE Single Driver In-Ear Headphones-IM301 consists of interior enamelled copper wrapped around Kevlar fibre to greatly increase durability and tensile strength. The surface of the cable is enhanced by TPE for softness and comfort with a final braided layer of nylon for lasting resilience and tangle resistance. Enjoy a high-quality sound in a capsule of quality built in ear headphones.